The gen 2 "LT1" is a normal sbc from the block down dimension wise. All you need is sbc frame pads and the other stuff that goes along with the swap. The accessoies are a pita. I remember something about the ac compressor being in an odd spot and requiring a notch in the frame? The rest is easy. At this point in time you'd be miles ahead of the game swapping as LS with the sequential injection instead of the multi port. The lt1 had the best flowing heads gm ever made at the time. That's reason for its superiority over a normal sbc. The rest of it is nothing to write home about. The ignition and injection is 80s technology... For what its worth there is no reason why your current power plant can be reliable enough to drive across the country and get good millage to boot..