im fixing to start working on my 1984 caprice, im getting the top redone, and getting it painted. but first i want to get it "runnin", (or make it faster). i got the stock 305 it now, but i want a 350 or better, i was looking at autozone's rebuilt 350, i was wondering are those any good, and how much hp they usually have, and i was looking at some on ebay, they have the power i want, but they are higher. also i want my car to have posi traction, will putting 3.73 or a 4.10 gears in it give me this? cuz 1 of my friends has a 3.73 i his car, (a 1984 cutlass) and his has posi traction and he can be doing 30-40 and floor in and start spinning, with a 350 engine! this is what i want, fast engine, real fast acceleration, and be able to spin like that, i like to show off and about all my friend like to race, now i can only beat a couple of them (stock cars like mine), so can you help?