If it's got the factory exhaust you could pick up a bunch of power from a set of tube headers. The engine bay is pretty tight in those cars, but theres no torsion bars to get in the way either.

If I remember right the rear gear in those cars was like a turnpike deal. 2.8 or worse? Then again who knows it might have 4.11's in it too!

3 speed TurboHydro 400 tranmission,(Bulletproof), 12 bolt Safety-Trac,(Posi) rear end I think was the correct G.M. terminology, where's Danny when you need him. He's a 'closet' G.M. guy

Yeah let us know Drew, this is interesting.