My bet is probably typical bolton setup, longtube headers, catback exhaust, air intake setup. Maybe a slightly bigger throttle body, probably not.

That is a fairly tame cam though, I was looking to go a little bigger, but really dont want a rough idle, a good bit more power can be made with stock heads and a bigger cam, but at the expense of the idle for the most part, honestly with that kind of power curve it should be awesome on the street, probably run mid-high 11's at the drag strip, and with a 150 shot put me into the 10's with very little trouble, all while maintaining great driveability and fuel mileage.