iirc the 302 and the 351 fit fine u just need to either fab up or buy the engine mounts/supports...and i also seem to remember that a trans am rear axle fits perfectly...i wanna 6.?? but i dont remember exactly
its been a while since i was on, but if mr. squatch is still here shoot him a pm...i know he put in a 351 and said that it was VERRRRY tight since it was a bigger engine than the 302
oh, and if u salvage as much as possible then it should come out to around 8-12k...again depending on how much u can salvage/fab/find cheap
gl w this project...its actually what i plan to do when i get a house, a garage...and a s**tload of spare time...lol...although i hear the rx7/ls1 swap is supposed to pwnzors!!!