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The difference between the engines in C3s and C4s is very little, because they're both Gen I 350s, until the LT1. The LT1 had reverse flow and vortec heads, that's about the only difference between that and the Gen I 350. The LS1 marked the Gen III SBC and its displacement is 346 and almost entirely different than Gen I and II. IIRC the LS engines are 6 bolt mains, made out of aluminum, and have an advanced version of the vortec head design. I don't remember the other changes, but they're extremely different and you can't interchange any parts with them and prior SBCs.
Check out the link in my signature, then go to LS1Tech's Conversions and Hybrids Forum. There's enough reading there to keep you busy for the whole holiday weekend. The best suggestion I can give you is to absorb as much information as you can, then search LS1Tech. Most every issue that you will run into has already been answered.
Good luck. When you're done, the end result is worth all of the work.
Whewww, Youve got one beautiful Corvette, Of any year. Top notch, I dont think Ive ever seen a better plan for getting the most out of a C3 vette. Congrats..
It would be a serious job but if you could pull it off it would be one Kick a$$ Shark.Great performance,better mileage,cleaner burning.Im pretty sure the C3 drive train would be OK handling 500HP.As long as its been refreshed and isnt in need of a rebuild.
The 2005 Z06 engine will be sold as a crate engine from GM Performance Parts! Does anyone know how much it'll cost? If it's going to be a crate engine, GM should have a little helpful information about how to get it into you car; i.e. the computer intefaces.