Ok, so I was heading out the door to a show today when a pop and clack clack clack came from my sbc. So it turns out I broke off a rocker stud..........damn! Anyway here's my question, my heads are 62 fuelie heads that haven't ever had anything done to them as far as I know. Would it make more "cents" to move on to a new set of performance heads or have the machine work done to the old double humps? As far a work to the old heads I would have too do studs, guides, seats and valves. Whatcha guys think?