Yeah the link shows LLY but they also have LBZ kit for 2006.5+... I didn't have time to go back and clarify.. I did update my post though.
List of other things to do includes building the trans whenever adding additional significant HP.
I did look at the SDP kit last year. I will be using them for a lot of the small mods I am doing in the next couple of months.
utilizing the stock turbo is fine if it is in good shape. i will be doing so eventually with stock fuel (besides a lift pump)
with the research i did i will be able too see just over 600rwhp with very acceptable egt's on some hot tunes.
a big single is cool but very anoying to tow with.
-i have driven in a lml with a single 72mm danville turbo and kory willis tuning and its fast but for just driving its not smooth.
-also driven in a built 1000hp duramax with 2 fairly big turbo's and it drove like mine does.
also the guy with big twins gets 24mpg and the guy with a big single get 17mpg but that could also be driving style.
if you are looking on good pricing on a bunch of parts call alligator performance and talk to matt he can put together a package deal at the fraction of the online cost.