If I wanted to throw some new roller rockers, valves, springs and retainers into a set of GT40p heads; what parts do I use? Made for what vechile/engine?
What kind of a cam do you have? Are you going to port them? Have angled valve jobs on them (which I recomend being that if you have new valves put in you will probably want the valve seats done anyways).
They'll accept all of the same hardware that standard E7TE heads will. I'd recommend better valve springs and a good 3-angle valve job while you've got them off though.