Please Help!
 

hello, so i have a 2002 mustang gt, 255 walbro fuel pump, 630cc injectors, bassani headers/x-pipe, magnaflow catback, tork tech tvs 1900 supercharger, diablesport predator tuner, and 373 gears.
eibach lowering springs, bilstein shocks, FR500 rims, 285/45/18 back, 275/45/18 front, cc plates, subframe connectors, rear swap bar, 13'' baer brake kit.
so my dyno sheet right now says 354rwhp 375rwtq on stock internals.
im have fun with it right now but its just not enough. i was looking to open her up but im not sure what to do. so i just go with forged internals or a stroker kit?. im reading that a 03-04 cobra crank shaft is good for 600+rwhp and its not to expensive. now im looking at dished pistons, flattop pistons, what should i do! im looking to get a smaller pulley for my s/c, pushing more boost, comp cams, valve springs, whatever it takes to crack the 500rwhp mark.
just looking for some help
thanks guys