I have a 2003 GT with 5900 miles on it. On the dyno at JMS recently it put out 377 rwhp and 432 rwtq at 8 lbs of boost. I have a P1-SC with a 12 lb pulley but I'm getting major belt slip. The car also has a bullit intake full Magnaflow exhaust, Vortech mondo bypass valve, FRPP 42 lb injectors, and a ton of other stuff. I've decided to build a stronger motor for the car and add cams, ported heads, long tubes, etc. Does anyone know if the stock GT crank will hold up reliably? I'm definitely using the good rods and pistons but my engine builder told me the stock crank would work fine. He also tells me that 500 rwhp won't be a problem. I'm also upgrading to Steeda's dual fuel pump but I'm not sure if I should change injectors again. I want to have a good reliable 500 rwhp (at least) for this car. Any suggestions are appreciated. By the way, I'm also told that a Cobra crank will cost me around $1300 because there's a heavy core charge out there now for them.