The only thing really giving the mustang any power is the shot of nitrous. An intake and cam isn't going to do a ton for the 5.0. The biggest restriction is the heads, which I don't understand why someone would do a cam, but not heads. But thats beside the point, the LS1 stock can run 12's, a lid and catback exhaust will help out a ton also. I definitely think your going to get beat.