1966 pontiac 421 engine specs

Often called the "Ram Air III", this engine was officially called the "400 Ram Air" for 1969 and then simply "Ram Air" for the 1970 model year. #9770716 aka "716" heads featured a 170cc intake port volume, and were considered a milder "street" version of the vaunted SD421 Super Duty heads. It remained on the same platform, but for the 1966 models, it became a different Pontiac series. In the 1960s the popular 389cuin (6.4L) version, which had helped establish the Pontiac GTO as a premier muscle car, was cut in half to produce an unusual, high-torque inline four economy engine, the Trophy 4. It was offered in the following forms: For 1957 the V8's stroke was increased to 3.5625in (90.49mm), for a displacement of 347cuin (5.7L). 1966 Pontiac GTO. A total of 1,808 Ram Air IV production cars were built over its 2-year production. An evolution of the RA IV and H.O. Deck Height: 10.215-in Its cast "670" heads had taller valve spring heights than the standard D-port heads, and the only 14-degree valve angle closed combustion chamber making these heads unique. Seat pressure: 110 pounds at 1.600-in Valve lift stayed at just over 0.400-inch with 1.5:1-ratio rocker arms. The 1966 Pontiac GTO was also the first car to replace the aluminum grille with plastic mesh-pattern inserts. Brand: Crower PN 60311, solid This new material had stronger alloys in the iron. 1969 - 400 Ram Air III or 350HO Code 48. Most likely prompted by its development of the Pontiac OHC six, the GM division built three different experimental SOHC 421 CID V8 engines in the early 1960s. The 1963 Catalina two-door sports sedan pictured here showcases the 421 H.O. The 1979 W72/WS6 equipped Trans Am was considered to be one of the overall best performing cars of the decade due to having a powerplant that produced more power than any other competitor on the market at the time with handling equipment to supplement the performance.[12]. Crower identifies this cam as a Level 4, which means it provides strong midrange and top-end power for heavily modified engines. Pontiac began as a "companion make" to the Oakland division of the General Motors line of automobiles in 1926. The fuel-injected engine became an option on any Pontiac model, carrying a staggering price tag of $500 (almost 15% of the car's base price). This engine was first offered in 1967 as the top engine option in full-size Pontiacs. $6.49 shipping. Valve guides: K-Line, liners Well, gaze upon these numbersa 421ci Pontiac with Tri-Power carburetion. Jets, Primary: Center #64 adjust power valvespring for 12 Hg at 1,000 rpm The Ram Air IV heads had 1/8" taller intake ports, larger intake port volume with more airflow, yet shared the Ram Air II round exhaust ports. The consent submitted will only be used for data processing originating from this website. Free local pickup. 1967 - 400 Ram Air or 428 Code 670. Engine Oil: 120 ft-lbs. "Armasteel" was a trademark of pearlitic malleable iron developed by GM's Saginaw Metal Casting Operations around 1936, which was referred to as "locking ball" cast-iron, as opposed to the "flaking" type found in other engines. The 421 was first availabe in a SD (Super Duty) model that was built for racing. Pontiac successfully competed against more-expensive inline four-cylinder models with their inline flathead six-cylinder engines. Get the best deals on Engines & Engine Parts for 1966 Pontiac GTO when you shop the largest online selection at eBay.com. The basic package included the heavy-duty suspension, with even stiffer springs and shocks available. Timing chain: LPC, double rollerINDUCTION The W72 offered many improvements over the standard L78 400 Pontiac. For 1959 the V8's stroke was increased to 3+34in (95.3mm), raising displacement to 389cuin (6.4L). Two tri-power 421s were optional, one with 356 bhp, the other with 376. Standard only for the Pontiac Bonneville was Pontiac's first-ever fuel injection system. Not long before the model year introduction, Pontiac management decided that the entire line would be V8-powered. Located at the back of the engine near the Distributor. 540306 featured 1.92/1.66-inch (49/42mm) valves and was carried over from the previous model year, production stopped in March 1962 and then casting No. 068) to 301/313 (No. It is a known fact that a person's pupils dilate slightly when viewing something pleasant to the eyes. VEHICLE TYPE . . This was a completely stock car on loan from a private owner for the test. - P.B. As Stock drag racing heated up at the dawn of the Sixties, the factories were serving up a constant stream of engines, transmissions and lightweight body par. The engine compartment of this concours Catalina is beautifully finished. Not where most enthusiasts go first. For 1967 only Pontiac called this engine the Quadra-Power 428. 1966 Pontiac Catalina Specifications and Production. The 1981 rendition of this engine was officially called the 301-EC [EC standing for Electronic Controls] in the 1981 GM factory service manual, removing the need for a W72 option separately as it was now the standard motor, similar to how all W72 engines in 1979 were coded L78.[16]. Continue with Recommended Cookies. Power ratings increased accordingly: Several dealer-installed camshafts were optional to increase power further to 317hp (236kW). The 400 2-barrel kept the 17 degree valve angles for '67; starting in '68 all Pontiac V8s went to the 14 degree valve angle. A big chunk of the appeal of the 1965 and '66 2+2 was the fact that you got a standard 421 under the hood: The 338hp, four-barrel 421-cu.in. Sponsored Stories . This is the original car featured in the May 1962 issue of Motor Trend Magazine that was modified by Royal Pontiac and driven by Jim Wangers. The short deck engine weighed about 40lb (18kg) less than the other variants and had an 8000 rpm redline. The 1969 HO 350 HO was equipped with the 400cuin (6.6L)'s large valve heads (# 48's) and the 400 HO camshaft and rated at 330hp (246kW). Example: A128 = January 12, 19*8. 18 watchers gasoline (petrol) engine with displacement: 6902 cm3 / 421.2 cui, advertised power: 252 kW / 338 hp / 343 PS ( SAE gross . Standard motor was the 421 4 barrel with 342 horsepower, which was no slouch itself. Final torque ratings may vary and need to be determined based on application and parts used. These heads can be distinguished from 6x8 heads through a small stamped "4" on the top of the front boss. Jim Taylor, well-known Pontiac engine builder, had that question on his bucket list for years. . Fuel line size: 38-inch, 516-inch to carburetor The SD-389 was limited to a single 4-barrel while the SD-421 used dual 4-barrels. Preparation: Weigh, soap-and-water wash In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than 330cuin (5.4L). Detroit, however, was reluctant to relinquish its time-tested biggest-car/best-engine formula. An HO version could be ordered in the GTO, as GM had lifted its restrictions on offering engines larger than 400cuin (6.6L) in mid-sized cars (resulting in the 454 (7.44) Chevrolet Chevelle, Bore and stroke were 4.121in 2.84in (104.7mm 72.1mm) 303.63cuin (4,976cc). (imp.) In the 1968 Pontiac GTO it was given a 10.75:1 compression ratio and tuned to deliver 360 horsepower and 445 foot-pounds of torque.[2]. Coil: GM All Pontiac Catalina 2-Door Sedan versions offered for the year 1966 with complete specs, performance and technical data in the catalogue of cars . Though production cars only got the two hood air inlets the name was retained. It was rated at 376bhp in 1967 and 390bhp in 1968 and 1969. The other major difference between the "typical" Pontiac engine of the time was that this one used the large . Pontiac Engine Torque Specs Pontiac Engine Torque Specs. Block description: '64 421ci #157 said the "Pontiac 421 cu. Car and Driver magazine, which had showcased the infamous Pontiac GTO vs. Ferrari's GTO comparison in 1964, organized another bout between the . Pontiac offered this to the public as a streetable version of the 421 SD. Tri-Power equipped Pontiac hot roda stout piece by anyone's standards. For 1971, Pontiac introduced another High Output (HO) version with standard internal parts, a reinforced block with four-bolt main bearing caps, and improved cylinder head design with 18-inch taller (3.2mm) intake ports and special round exhaust ports for better breathing, yet still making just 335hp (250kW) gross (or 310hp (231kW) in the more accurate SAE Net system). Mods: Flow-test indicated '66 center carburetor would be required to improve total cfm, adapter made to fit '66 center carburetorIGNITION True Pontiac engines were designed and built in Detroitnot on a computer, but often by GI-bill-educated engineers who grew up working with their hands and now had a slide rule in their pocket instead of a greasy rag. The heads were a new design featuring siamesed intake ports. In 1967 the 421 was enlarged to 426.61cuin (7.0L) by increasing its bore to 4.12in (104.6mm). Compression ratio was a modest 8.00:1, with valve diameters of 1.781in (45.2mm) (intake) and 1+12in (38mm) (exhaust). It used the "744" camshaft (301-313) in the earlier manual trans versions, later downgraded to the "068" version, and the 288/302 duration cam with automatic transmission. 1966 Pontiac 2+2 $64,995. To determine horsepower from airflow, invert the equation: The 670 heads were used until May 1967 when they were upgraded to become the "97" heads, which were then replaced late in the model year by the "997" heads which incorporated the upgrades of the "97" heads. of torque at 3,600 RPM in the Firebird, with only a small throttle restrictor tab on the Firebird being different. It was rated at 360hp @4300 RPM in the GTO and 370 @ 4600 RPM in the Grand Prix and other full-size Pontiacs. The valve angle was reduced from 17 degrees to 14 degrees for better breathing. Released in 1961, the 421 was a bored and stroked 389 which sported a bore of 4.094 and a stroke of 4.00. The 400 HO was offered as an option for 1967-1970 for GTO and 1968-1970 for Firebird. The Ram Air IV also used a lightweight aluminum intake-manifold that produced a weight savings of 1015lb (4.56.8kg). The Pontiac 389 engine was produced from 1959 to 1966, and has a 4.06" bore and 3.75" stroke. It also could hold its own against a range of performance cars. In the Firebird Ram Air induction for the 400 HO was a separate option for 1969(included with Trans Am) and included with the engine(optional in Formula; included with Trans Am) in 1970. Pontiac first offered three two-barrel carburetors in 1957 and the Tri-power set up was an option on the GTO from 1964-66. He wanted to confirm his parts are up to the task of holding the cylinder pressure that creates horsepower. The next 1 or 2 numbers represent the date, and the last number is the year. engine, dual exhausts, three-speed manual transmission, Hurst shifter, 3.42:1 rear gears, heavy-duty suspension, bucket seats, upgraded upholstery, carpet, emblems, "Decor" louvers, pinstripes, lower . These guys lived by mathematics since every function of an engine that converts chemical to mechanical energy can be assigned a number. By 1979, Pontiac was no longer allowed to produce the 400 engine as emissions further tightened. It is probably best known for it's Tri-power option, which was optional on GTO's from 1964 through 1966.. A Pontiac SD 421 came with forged steel rods and crankshafts for extra durability. 1966 Pontiac Catalina technical specifications and data. Some production test cars ran considerably slower and yielded 14-mile (402m) times in the 14.5 second/98mph (158km/h) range in showroom tune (uncited sources)- results that are quite consistent for a car with a curb weight of 3,850 pounds (1,746kg) and the rated 290hp (216kW) SAE NET figure that some sources suggest was "under-rated." 1. 1965-75 Pontiac & Tempest engine tune-upspecifications including timing, dwell angle, and Spark Plug Gap, and firing order. A set of Hooker Super Comp headers will be used on the dyno, and Jim is porting the stock heads to increase intake-port flow by 30 cfm. Are you thinking of buying a 2007 muscle car, or any other car? At the end of 1976, Pontiac was no longer able to continue production of the 455 (7.5 L) V8 motor due to the tightening emissions requirements. ", https://tran-zam.com/fhistory/1977Engines.aspx, "Hitman's Pontiac Trans Am Site - WS6 and WS7", https://tran-zam.com/fhistory/1978Engines.aspx, https://tran-zam.com/fhistory/1975Engines.aspx, "Unsung Muscle: '75 455 HO Pontiac Trans Am", https://tran-zam.com/fhistory/1981Engines.aspx, "Directory Index: Pontiac/1967 Pontiac/1967_Pontiac_Performance_Brochure", "609ci Pontiac Ram Air V - Chief Stomp 'Em", Pontiac experimental V8 427 Hemi TOHC Tamrazs Parts (800) 442-4601, "McKellar's Masterpiece: The Pontiac Overhead Cam 421 V8", https://en.wikipedia.org/w/index.php?title=Pontiac_V8_engine&oldid=1136467635, Articles needing additional references from January 2010, All articles needing additional references, Articles that may contain original research from October 2016, All articles that may contain original research, Articles needing cleanup from September 2022, Articles with bare URLs for citations from September 2022, All articles with bare URLs for citations, Articles covered by WikiProject Wikify from September 2022, All articles covered by WikiProject Wikify, Articles with multiple maintenance issues, Articles with unsourced statements from December 2008, Articles with unsourced statements from April 2021, Articles with unsourced statements from February 2018, Wikipedia articles needing clarification from April 2021, Articles with unsourced statements from July 2016, Articles that may contain original research from September 2018, Articles with unsourced statements from March 2018, Articles to be expanded from February 2020, Articles with empty sections from February 2020, Creative Commons Attribution-ShareAlike License 3.0, 7.9:1, 8.0:1, 8.4:1, 8.5:1, 8.6:1, 8.9:1, 10.0:1, 10.25:1, 10.5:1, 10.75:1, 11.0:1, Two-barrel carburetor, 7.9:1 compression, 192hp (143kW) @ 4400rpm, 297lbft (403Nm) @ 2800rpm, Four-barrel carburetor, 8.9:1 compression, 216hp (161kW) @ 4800rpm, 315lbft (427Nm) @ 2800rpm, Two-barrel carburetor, 8.9:1 compression, 205hp (153kW) @ 4600rpm, 294lbft (399Nm) @ 2600rpm, Four-barrel carburetor, 8.9:1 compression, 227hp (169kW) @ 4800rpm, 312lbft (423Nm) @ 3000rpm. 1968 - 400 Ram Air II Round Port Code 96. The air cleaners look like those used on the top dog 376 gross HP 421 CI engine but there was also a lesser 356 HP version available too. The 455 was fundamentally the same for the 1976 model year, albeit the shaker decal now just read "455". From 1955 through 1959, the Pontiac V8 was also used in some GMC pick-up trucks. This may have been propagated by the only authorized company that is licensed to reproduce these decals not including the "6.6 LITRE" in the Trans Am decal kits, and only including "T/A 6.6" with no extra cost. Wires: NAPA Belden 7 mm engine for 1963 is reported to be putting out 500 ft-lbs torque at 4,200 rpm and . Only about 2000 like this one were built with 4 speed Muncie transmissions. While not related to the 400 W72, the concept was the same. The standard head seen on an L78 400 Pontiac was the low compression 6x8 head, while the 6x4 head seen on the W72 had hardened valve seats for a higher RPM operating range, improved air flow, and higher compression. For 1958 the V8's bore was increased again to 4+116in (103.2mm), increasing displacement to 369.4cuin (6.1L). HOT ROD and CAR AND DRIVER) were fitted with the Ram Air IV-spec camshaft and functional hood scoops - a fact that has been confirmed by several Pontiac sources. Still, it was the strongest American engine offered that year. When Robert Critchfield took over as general manager in 1952, he launched an ambitious plan to move Pontiac into the upscale, mid-range market occupied by Oldsmobile, and that demanded V8 power. Based on the same short-deck as the 301, the "LS5" 265.1cuin (4.3L) was offered only in 1980 and 1981. Pontiac V8 Engine Tune-Up and Torque Specifications. The Block Date Code represents the production date of the engine. Ellingson Motorcars (877) 638-7170. With higher compression and dual exhaust it produced 280hp (209kW) for 19631964, and 285hp (213kW) for 1965 through 1967, its final year. The 301.6cuin (4.9L) 301 was offered from 1977 to 1981 and also installed in other GM cars during those years. This was underrated at 330hp (246kW). A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). Rear Main Cap. Boost was wastegate limited to 91psi (0.6210.069bar). Surprisingly, Mopar actually agreed and sent over several of the engineers that designed both the 392 and 426 Hemi. Styling for Status. A 400 cubic inch ram air equipped V8, it was an option on the 1969-70 GTO and Firebird Formula. In 1977 the 400-cubic-inch (6.6L) T/A 6.6, (RPO code W72) was created to fulfil the performance engine gap in the Pontiac line-up. Size cfm: Total flow, 1,050 cfm A common misconception made by enthusiasts was the notion that all Pontiac engine equipped Trans Ams featured the "T/A 6.6" decal on the shaker, however, it was exclusive to the W72 engine that was featured on less than half of all Trans Ams made during this period. Low-performance and two-barrel applications, the standard engine in full-sized Pontiacs, got 1.96in (49.8mm) intake and 1.66in (42.2mm) exhaust valves and pressed in rocker arm studs. Late in the model year the Ram Air 455 HO was made an available option for those GTOs with the optional "The Judge" package. This is it! The manuals had Hurst shifters. This S/D retains the original "Traction Master" traction bars and two-bar spinners on the original 8 . It would later become known colloquially as the "Ram Air III", though Pontiac never called it by that name. Price $14000.00. Royal Pontiac developed the prototype of the package on their 1965 GTO drag car and Pontiac picked up the idea and in August 1965 Pontiac offered the new Fresh Air package to dealers consisting of the parts and instructions needed to make the hood scoop functional, including the metal tub to mount to the carburetors and rubber gasket to seal it to the underside of the hood. For a few more ponies through better oil control, a factory full-length windage tray will be added, since Pontiac didn't use one on this engine originally. With some WS6 "Trans Am Special Performance Package" bundles in 1978, the W72 engine was incorporated with the WS6 option group and not listed on the dealer order invoice. See Consumer Guide Automotive's New-Car Reviews, Prices, and Information. [5] It was rated at 360hp (268kW), but the Grand Prix with the same specifications was rated at 370hp (276kW).[6]. . Both of these engines were originally dealer-installed options, but since the NHRA moved to limit racing eligibility to factory-available options on cars available to the public, Pontiac made the SD 421 a factory option for 1962, and most of the approximately 164 SD 421 engines were installed in the Catalina, with another 16 being installed in . The piston weighs 630 grams with the pin versus the stock piston and pin weight of 790 grams. . All 428 cylinder heads received the 14 degree valve angle, closed chamber only in 67 and open chamber 68 and up. There was also the addition of dual exhaust, and for vehicles equipped with a manual transmission, a slightly more aggressive camshaft. Along with proper parts selection, accurate machining and assembly are also important Most Pontiac engines like total timing (rev engine past 3000 or so until the mechanical advance stops moving/advancing, vacuum advance disconnected to check total timing) somewhere between 32 and 36 degrees. These are general guidelines. 1967 was the last year for closed-chambered heads. Learn how Classified Ads works . The most famous S/D of them all. Pontiac RAIII/IV Engine parts collection Price $14000.00. The 455 HO moniker was again carried over, this time as a near-exact repeat of the 1971 offering, the only changes were the carburetors (they used a conventional 750cuft/min (21m3/min) unit this year), and the head castings (casting #7F6). Casting No. By comparison, the factory 421 H.O. The development of this V8 dates back to 1946, when engineers began considering new engine designs for postwar cars. Lifters: Crower solid with EDM oil hole (0.024 inch) The 301T block was significantly more durable than the standard 301 block and received a thicker bottom end. Upon reflection, many did not consider that it was the only large displacement engine still on offer for any performance car on the market, and reconsidered Pontiac's position between the rising CAFE emissions restrictions.[14]. Only 157 Ram Air IV Firebirds, including 55 Trans Ams, were built for 1969. It added '421' engine badges on the front fenders, 2+2 insignia on the deck lid and rear fenders, and simulated louvers behind the front wheel cutouts. This camshaft sported a 308-/320-degree duration with 0.47-inch (12mm) lift. The W72 301 was a tuned L37 301 Pontiac V8 with some minor upgrades. For 1965, however, the 2+2 became a bonafide muscle car. Angles used in valve job: 30-deg intake, 45-deg exhaust seat, width 0.040-in intake, 0.060-in exhaust Carb: (3) Rochester two-barrels PMD All L78 Pontiac 400 equipped cars received the same shaker decal as the L80 Oldsmobile 403, being "6.6 LITRE". Regarding Crower's upgrade suggestions for its camshaft, Jim pretty much has it covered. The V8 engine was introduced for the 1955 model year as the "Strato Streak". Math, not gasoline, makes horsepower under the hood of a Pontiac. An innovative design feature was mounting the rocker arms on ball pivots on studs set into the cylinder head, rather than using a separate rocker shaft. In addition, a shallower spherical-wedge combustion chamber moved the tuliped valve heads .040" closer to the piston at TDC, improving mixture draw considerably during the intake stroke. Primary tube length: approximately 31.00 inches Metallurgy of the critical parts is an area often overlooked, but not by Jim Taylor. Spiral clip Approximately 6,000 2+2's were built in 1966, the only year the 2+2 was its own model. According to the engineers who worked on the project, the SOHC 421 engines produced around 625hp and were capable of turning 7,000 rpm. An example of data being processed may be a unique identifier stored in a cookie. If you've been thinking about cruising the local boulevard in a classy convertible, but find yourself longing for the power under the hood that only a muscle car provides, perhaps it's time to take another long look at Pontiac's restyled 1965 Bonneville convertible. A camshaft with 301/313 degrees of advertised duration, 0.407-inch (10.3mm) net valve lift, and 76 degrees of valve overlap was specified for actual production engines in lieu of the significantly more aggressive Ram Air IV-spec camshaft that had originally been planned for the engine (initially rated at 310hp (231kW) with that cam), but ultimately proved incapable of meeting the tightening emissions standards of the era with sufficient margin to satisfy Pontiac emission engineers given expected volume production variations. In 1961 Pontiac continued to push the horsepower upwards with the release of the 421 engine. The W72 also featured a camshaft with a higher duration, finer tuned 800cfm Rochester Quadrajet, insulated fuel line, larger 60PSI oil pump, chrome valve covers, a larger harmonic balancer, and the "T/A 6.6" Shaker decal. which was seen on the hood of the 1957 Daytona Grand National winning car driven by Cotton Owens. Pontiac's initial plans were to use a camshaft with specs identical to the 041 Ram Air IV camshaft, but testing showed emissions, while technically compliant, did not have "cushion" to satisfy Pontiac's emissions engineers, to avoid production variation leading to any non-compliant engines being produced and sold. When fitted with other high-airflow components, it produced a good balance of low-end torque and higher-RPM power. The crankshafts were also unique in the fact that they featured only two counter weights instead of the usual five and also featured lightened connecting rod journals. Given that, it was no accident that the leader in intermediate muscle also put together the finest full-size performance machine -- the 1966 Pontiac 2+2. The 301 Turbo package mandated air conditioning, the THM350 (sometimes referred to as the CBC350 in various literature) non-lockup automatic transmission (THM350C lockup in 1981 Trans Ams), and 3.08 rear axle gearing. . The valve size increased as well, to 2.11in (53.6mm) intake and 1.77in (45.0mm) exhaust valves on high-performance heads. The stroke increased to 4.21-inch (106.9mm). ENGINE TYPE Water-cooled V-8, cast iron block and head Displacement 428 in 3, 7015 cm 3 Power 390 hp @ 5200 rpm Super Duty 421s were back, tougher than ever. The 455 HO package was only available to late model year Pontiac Firebird Trans Am's, and was mandatory with a 4-speed transmission. This simply meant that Pontiac installed both the SD-389 and SD-421 into vehicles on its assembly line. The 301 had a bore and stroke of 4in 3in (101.6mm 76.2mm). . A period-correct battery cranks the high-compression 469-cubic-inch Pontiac engine. It was renamed 428 HO for 1968. Pontiac Engine Torque Specifications. Offered on select models from 1957 through 1966, Pontiac's Tri-Power induction system added a new dimension of performance to the General Motors brandand a colorful new term to the hot rodder's vocabulary. Pushrods: LPC chrome moly Next time we will cover the induction system and the dyno testing to see if Jim meets his goal. Pontiac V8 Engine Codes and Specifications. Fuel pump: Will use 110-gph Carter Pontiac produced the 421 V8 engine from 1961 to 1968. The Pontiac 2+2 was promoted as the "big brother" to the iconic Pontiac GTO. For those who may not be familiar with the equation, here it is again: It was factory rated at 366hp at 5,400 RPM and 445lbs.ft. The GTO's new hood scoop design, with the inlets centrally located and mounted above the carburetor, provided the opportunity for experimentation. The 1970 '455 HO' was a conventional "D" port engine. Optional engines included the 356hp Tri-Power as seen on our feature car (code WH manual or YJ auto), or the 421HO, rated at 376hp . It shared the 389's 3+34in (95.3mm) stroke, but its bore was 3.78in (96.0mm) for a displacement of 336.66cuin (5.5L). In 1963 Pontiac dropped the Buick division built 215 cu. street engine. In 1961 and 1962 they were available with either one 4 barrel carburetor or a dual 4 barrel carburetor setup depending on whether the buyer wanted to head to the racetrack or drag strip. Information and specs for the Pontiac 421 V8 engine. SELLER Glendale, Arizona 85305. Over the years he has amassed a library of data from investing in metallurgical testing with a well-respected laboratory. Both engines received the McKellar number-10 camshaft, which was much like a solid-lifter version of the hydraulic number-041 of later years. Unique exterior features included "2+2" badges, twin lens taillamps, and chrome bodyside gills; Pontiac's famous eight-lug aluminum wheels were the ultimate optional touch.

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1966 pontiac 421 engine specs