I'd still want my truck, but I wouldn't have dicked around so much trying to make a NVG3500 work with a aluminum LS6 block. Think I have the solution now but won't know til a few more weeks when I can get it towed back down to work to try it. Didn't know about the different starter offset. Tried LS6 flywheel/4.3 NVG3500 clutch at first, starter worked good, but flywheel was too thin so the clutch wouldn't release. Put the 4.8 flywheel/4.8 clutch in it and now clutch releases but the damn starter hits the flywheel. Gonna use the 4L80e flexplate spacer which is 3/8" thick and what I need to put behind the setup I have now and it should be fine. If I had of known ahead of time of all this BS I would have just did a T-56 swap at the same time. Still gonna do that in the future though!
2000 Chevy Silverado RCSB LS6 5 speed, LS6 short block, 317 heads, LS6 intake, Lunati 220/224 .575/.575 112LSA cam, Edelbrock Headers, CTS-V accessory drive, Nelson Performance Custom Tune.