Official NBS 4.3v6 to GEN 3 V8 swap Guide

[zebra]

finding a harness from a manual truck will be the easiest way, but you can use either. since you'll have the manual t-case, you don't have to worry about finding one with the electronic 4x4 wiring. also, if you use a harness from an auto, you can pull out the transmission wiring (with the exception of the VSS & reverse). click my sig to find the company i sent mine to (because i didn't feel like fiddling with it). it also shows the jumper you'll have to add to the fuse block for the clutch safety switch (which you can just reuse from your V6 harness).

[3car]

finding a harness from a manual truck will be the easiest way, but you can use either. since you'll have the manual t-case, you don't have to worry about finding one with the electronic 4x4 wiring. also, if you use a harness from an auto, you can pull out the transmission wiring (with the exception of the VSS & reverse). click my sig to find the company i sent mine to (because i didn't feel like fiddling with it). it also shows the jumper you'll have to add to the fuse block for the clutch safety switch (which you can just reuse from your V6 harness).

Thanks for the info. I read over your thread, and Current wiring is about 25 miles from me. Convenient. lolc