LS Swap with a single turbo!
I'd put in it whatever it is that Brett has (TH400 with a fancy lockup converter) or try your hand with a 4L80/85???
The ally flex plate bolts right up to the th400 or 4l80 converter.
Well the T-400 seems to be working well for you at 9 seconds how do you like it and do you think it can be pushed harder??? The Turbo 400 would be a lot cheaper and I know them well just haven't seen a lot of them used behind the diesels and the talk around the forums seems to lead down different paths.
I still haven't decided what class to build for kind of thinking pro street and keeping it licensed so I can roll into a few local car shows a year...
If you back half it, you're in Pro Street (like Brett and whole host of other super fast cats!). Super Street (approaching untouchable for most as well) is supposed to be OE frame and traction bars only. No ladders or more than two-link rear suspensions.
Is your truck a trailing arm rear suspension or is it leaf springs? I'd think you could get away with a pretty healthy racing suspension with an OE-based trailing arm setup and coil overs. I think brett's was like that prior to going back-half and 4-link.