. For decades, the Pontiac 400 has been a staple of muscle cars, providing power, torque, and reliability. By using a standard bore 455 piston in a. . . Internal balance. . . Tremec Transmissions and Clutches. search. com%2fpontiac-ram-air-400-engines-3887962/RK=2/RS=7ThEY31Ao2DQHUxdnwjl3E. The Pontiac 400 block was decked and squared, then fitted with billet-steel four-bolt main caps before punching the block. . . . Warranty and Free Nationwide Shipping Offered on all Engines. . . High Performance Pontiac Parts. Engine Factory Engines. NOS 60-76 Olds 442 Hurst Olds Pontiac Firebird GTO 400 455 PF24 oil filter GM. Pontiac 400 valve covers. or Best Offer. 750, stock rod length is 6. . . . 400 Pontiac V8 Engine parts in-stock with same-day shipping. Model Year Engine Trans Type Transmission; 6000: 1982-1991 : TH125: 6000:. Sure, they made 428s and 455s, but the 400 was their go-to muscle car engine for Firebirds and GTOs. 2-Bolt or 4-Bolt Main Engine Block. . . . . Keep your compression ratio at about 9. . Used engines are not as costly as newer ones. Eagle 51503 Pontiac 455/468 Competition Rotating Assembly 10. . The major components of the build up include a '67 GTO 400 block. . Page 1 of 1 Start over Page 1 of. . 1ST PHOTO PLACES WHERE CODES ARE USUALLY FOUND IN A 400-455 ENGINES. New Hydraulic flat tappet cam. Report. 461 cid Pontiac engine can be built with a stock Pontiac block or an MR-1 aftermarket block. bore now, bore to. com for: Pontiac 1000, 6000, Acadian, Bonneville, Fiero, Firebird, Firefly, GTO, Grand AM, Grand Prix, Lemans, Optima, Phoenix, Starfire, Sunbird, P2000, Sunbird, Sunburst, Sunfire, Sunrunner, Tempest, Van, & Ventura. . - Pontiac Engine Builder -. RPM - RON'S PRECISION MACHINE, INC. Crate Engine, GM 350, Stage 1, Long Block, Internal/External Engine Balance, Cast Iron Heads, Chevy, 350, Each. . If you want even more power, the optional Ram Air IV 400 engine could be chosen, producing a powerful 370 horsepower.