Yeah what he said. I mean you could get it to fit, the rear end most likely would NOT need to be swapped out unless you're trying to drag race. You'd need a custom drive shaft, and you'd have to figure out how to mount it in the car...I assume you want to drag race because anything else w/ that motor and you're talking about a fucked up weight ballance. LS1s are not exactly a bolt in procedure, but you are talking about a V8 that weighs as much as the 4cyl engine in there already, and it will sit further back and lower when you finish the swap.