The outside of their Super Duty engine is cleverly disguised to look exactly like a standard Firebird 455 V-8. That means a massive lump of cast iron, with its water pump the only piece of aluminum in sight. But the source of strength lies not far below its expanse of turquoise paint....
This Trans Am is a runner as the seller claims that it “runs and drives great“. The 250 net HP, 455 CI engine appears to have undergone some mods with an Edelbrock carburetor, aluminum non OEM intake manifold, and an open-element air cleaner. The Accel decal would be indicative of an...
(advancing the timing at high rpm for increased power), a thinner head gasket to raise compression to about 11.23:1, a gasket to block the heat riser of the carburetor (keeping it cooler), larger carburetor jets, high-capacity oil pump, and fiberglass shims with lock nuts to hold the ...
The Y82 Trans Am could be ordered with any of the three available engine options in 1977 but the most powerful engine was the introduction of the W72 400 cubic inch motor which matched the 200 horsepower rating of the previous year’s 455 cubic inch V8. The W72 engine is usually identif...
(0.6 bar). Since the light-duty 301 hadn’t been designed with this sort of duty in mind, Pontiac engineers added a higher-capacity oil pump and restored some of the beef that had been trimmed from the normally aspirated 301, making the 301T somewhat stronger and heavier than the ...
Offered with both 400 and 428 (later 455) V-8s, the new GP was a handsome brute, with a short-deck notchback profile and a distinctly Pontiac face ahead of a mile-long hood. Inside was an innovative curved instrument cluster bringing all controls within easy driver reach. Cribbing Model ...
Gold 1970 Formula Race Car Pontiac POWER Rules! The heads are stock RAM AIR IV with Comp. Cams 999 roller springs. I use JR 2" headers with 10" long extensions on collectors. I use aWentzler intakewith a 800 Holley carb,and a Mallory 250 electric pump out back. ...
Pontiac would redesign the Grand Prix for 1973 and find instant sales success. Production would increase by two-thirds over 1972, from 92,000 units to 154,000. That momentum wouldn’t hold for long as the OPEC oil embargo caused gasoline prices to soar in 1973-75 and car buyers began mov...