Hey 93 ecss,

Here is my 2cents worth... Nelson did my harness for the stock 4L60E in my '94 Z-71. there is a lot of info out there saying the 1996 and older trannys won't work with the LS computers. My guess is that the first attempts at these conversions involved different LS computers than the ones we are seeing now. My computer is from a 2005 Silverado and Nelson did the harness and tune. Don't skip out on getting the tune... big bank for the buck.

Also, make sure you get the 1" offset motor adapters. These actually place the engine in the same spot as the old engine. Your transmission won't have to move 1 mm. My truck is really fast with the new engine. I can't believe the difference the tune makes.

Good luck,

Brian