The motor is going to be a 5.1 stroker 10:1, fox lake CNC head port, 226-220ish duration cams with an HPP twin turbo kit. I want a street tune with around 650-700 hp @ 15 psi +/1 psi, and the ability to go to 850rwhp for standing mile runs. I've decided on Precision Billet CEA 5558 journal bearing with the 55mm Anti-Surge S compressor housing - 4"in/2.5"out, 58mm turbine T3 v band exhaust housing. I cant decide on the .48 AR or .63 though. I cant find any compressor maps on this turbo either. Seeing as how the base configuration on most twin kits are t3/t4 50mm turbos I'm pretty sure this will be fine, just looking for insight from personal experience.