If you want a drag motor, go with Chevy. Lot more parts available, and less expensive. You can build a Pontiac motor today but I don't think you would have the selection of parts and cool stuff that are made for the Chevy, Ford, and Mopar engines. The other thing is--if the Firebird has an Olds engine, not a Pontiac, you're even more limited.

The LeMans wasn't a high-performance car, so it had a pretty mild version of the 350. Pontiac put 400s in the Trans-Ams, they were quite a bit more potent, and a few hot 455s in the late 60s and early 70s.

EDIT- No need to use the quote function if it is clear who you are responding to. Please help save bandwidth. -Admin