Here's a link to a Wiki writeup that gives you a wide range of vehicles that had the GenII LT series engines, which would be your easiest swap as Jerry pointed out - GM LT engine - Wikipedia, the free encyclopedia . If you go with some of the newer LS series small blocks you will have to do some motor mount work to make things fit. If you buy a takeout package from a reputable salvage place you can get the engine & tranny complete as a package, and also the engine, body & chassis wiring harnesses with the ECU. All of the engine sensors will be in place. You'll likely have to send your ECU (computer) to one of the guys who clears the VIN links and all of the on-board security stuff, and some of them will strip out the un-needed wiring in the harness or sell you a new, much smaller harness for the package. If you do your homework and study some vehicle specific web sites you can make it pretty painless. If you buy a computer controlled engine & tranny from craigslist and don't get anything with it then the challenge level just went up exponentially....