What do I think?
Man, is that a loaded question????
I can tell you that Duramax, Gen 3 with the 360 horse upgrade and a 3.42 is running 11s at the local track here.
Considering the problems with the older ones, it would have to be yours, with the upgrade.
Just remember to change that fuel filter every 5k, and use an ACDELCO filter. NOT AFTERMARKET.
It could be alot of fun.
Allthebest, c4c5