what i mean is how limited am i with the 94 cobra (gt-40) heads and intake. i'm thinking of doing a cam swap and freshening up the motor but budget is a huge factor right now. i currently have no tune other than stock and i'm still running the stock mass air sensor and 24 lb injectors and fuel rails. the cam i have already (scored it for free) is a lunati with 500 intake and 510 exhaust with a 112 lobe sep. will there be clearance issues with 1.7 rockers and stock pistons?? i'm also running a 125 dry shot and my short term goal is mid to low 12s if possible. thoughts, advice??