Leaderboard

You'd want to swap the entire dropout. Engine, trans, wiring, and all. I've read from those who have done it, that swapping the drivetrain from an H-body is considerably more difficult than from a W-body donor as all the engine mounts are different. Back when I was considering a swap like that, the person that did it strongly recommended I find a donor W-body.

Compare the wiring diagrams for the '92 to the wiring diagrams for the '03. Wild Guess: you'll need a heap of modification, and you'll need ALL the computer, sensors, and emissions controls from the '03 if you live in Commiefornia or any state that uses Commiefornia emissions testing. There's also the idea that the '92 transmission is not up to handling the power of the '03 engine; so you might end up swapping the entire subframe/suspension/steering. Enjoy the '92 for what it is; or sell it, buy a newer, supercharged vehicle in usable condition.