ProMax 66 in either the 16 Stainless Steel or 13 SS housing would be great. The ProMax 66 Kit part # for the 16cm housing is 2666467LB for an LB7 and for the 13cm it is 2366467LB. With a big fuel tune the 16cm SS will spool very close to stock. The 13cm SS will spool a little quicker.
This is an S300 Borg Warner based charger with HTT's custom housing and clipped wheel. It has a 66mm Compressor Wheel (66/25.4=2.6") and a 71mm Turbine. The wategate is adjustable and set at an optimal 40 psi by HTT. The kit comes with all necessary parts to make the conversion from stock including HTT's pedestal and down pipe.
Recommended supporting hardware would be Upgraded Allison and Torque Converter, Lift Pump, Intake, 4" Exhaust, and a big fuel tune.