Originally Posted by woj's72lemans
okay so i just bought a 76 pontiac 400 engine that i am aiming to build up for power that will eventually be put into my 72 lemans. now as far as thi motor i heard it is a slug but can be built up. i am looking to bore it .30 over, cam it, headers, edelbrock performer or air gap manifod, and i am just unsure of the ebst way to achieve my goal. please help me ith any information, tips, advice, or part suggestions thank you
A Pontiac 400 can be made into a very strong running engine. If you have the desire and money, you can put a 455 stroke crank into the 400 block (takes a crank w/400 sized main journals) for even more torque. Heed what was said above about which block to avoid if building a 400 into a "455".
But even at 406 ci (400 w/a 0.030" over bore), a Pontiac can shine. My way of building it would use basically a stock crank, forged rods, cast pistons, and casting 12, 13, 16, 62, 670, or similar heads or if the budget allowed, aluminum Edelbrock or KRE heads. An engine built w/these parts and a streetable cam could make an easy 450-500 hp and as much torque, w/enough vacuum for power brakes and an idle that wouldn't shake the fenders off the car.
Arm yourself w/info if you plan on getting into Pontiac engines.
Pontiac info and sites