I feel my car is at the limit on several components. My entire internal engine and drivetrain is stock except a set of GT350 axles. Only power mods are Procharger P1X and a fuel system. Car has run a best of 10.20/138, and a best 60' of 1.62. I do have a STH starter kit & drag springs, and some big mickeys. I feel like the aluminum rear diff, and stock driveshaft is on borrowed time. I may need to start at the back, and beefup going forward.