My son swapped a 360 magnum and an NV4500 into his 88 where a 318 (86HP or so) and automatic was. It was fairly easy and he only had to figure out a couple of wires. It sure changed that truck from a 23 second dog into a 16 second bit of a Hot Rod (that's 16 seconds with 3.5 gears and 36 inch tires).

Sheldon