Chevrolet Engine into a Firebird

Short answer: A Chevy engine isn’t a direct bolt-in — Chevy uses a different bellhousing pattern from the Buick-Olds-Pontiac (BOP) family. You’ll need an adapter to mate it to the Pontiac transmission (~$65 from Summit/Jegs/PAW — ask, it’s not always cataloged), Camaro motor mounts and frame brackets (the subframe holes already exist), Chevy accessory brackets, and you’ll reroute the fuel line to the passenger side.

Several members suggest selling the Corvette motor to a Corvette owner and buying a Pontiac 400 or 455 instead — more low-end torque, more correct, and worth more in the long run (especially if the car is a true 400 car, the only one that used the 400 transmission).

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Content last modified: June 13, 2026 at 10:06 am


Categories: Engine - All, Engine - General Info

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2 Comments

  1. Are you referring to only 67 Firebirds when you say “true 400 cars (the only one that used a 400 trans)”? I have a 69 convertible with a 350 HO, 325 HP, RAM Air III and a Turbo 400 trans.

  2. WOW. I was searching for a 68 Firebird with a 327 engine, hoping to find my brother’s car of his youth. When he was about 19 or 20 he had a 1968 green Firebird. After about 1 year or so of ownership, he found a perfectly good Corvette 327 engine in a junk yard and decided to install it when it looked like the motor mounts/other were similar. He was successful and even raced the car at Delmar Raceway in DE. The car was quick, but he never won a race as he was placed in Modified Stock competing with some very heavy hitters. If you still want to pursue you installation and would like to know more, contact me and I’ll try to hook you up with my brother. Good luck!

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