I used Brendan from LT1 swap. his web site was so full of information that I decide to do my own harness. it was relatively easy just took a little time and a quite place to think. Saved my self a bunch of money I could use for other things. (I think I spent about $6 dollars for a odb2 port, relays and a few terminals). Brendan also reprogrammed my PCM for $75 to all the things I was using and removed what I wasn't including, MAF. plus I sent him the PCM and he returned it the next day. I couldn't believe how fast he was. He also supplied me with some tech support. It is nice since of accomplishment knowing I did the harness and if I ever have problems I should be able to figure them out myself, but if not, I know Brendan will help me out. BTW it runs great!
check out his website.
http://lt1swap.com/index.htm