I thought that maybe you may have some ideas that could help me.... I am finishing up my T56 swap. Here is what I found that I have had to run in order for my truck to even move. I have a stock flywheel, Z06 or Duel friction disc, and Pressure plate made for my truck. The Duel Friction clutch disc gave me more plant it and go power. The LS1 flywheel would not work because the crank shaft is different in the 4.8 and it will not clear the starter either. I tried bolting up the t56 starter and it still wouldn't clear the starter. I had to use 1/2" spacer in order for the transmission to even bolt up because the shaft coming from the transmission that lines up on the crank was too long. So I now have everything lining up and bolting up. I am the clutch was slipping with my 22's and now that I have my stock wheel and tires on it is not near as bad. It was slipping on incline and it is not slipping unless I make it slip now. I am at a loss on my project.....