Finally found some, stock springs have a seat force of 87, that will force the valve open at about 50 PSI. These have a seat force of 122, go ahead and try to blow that open. They are ungodly expensive and I still have to have minor shims made. The heads will be complete this week, and finally the engine will be ready to drop in. Freaking custom parts!:bang:bang:bang:bang
The good news is that I can run my planned 65 PSI boost and not have to worry about smacking valves. Oh yeah, wonder what a 6.0 sounds like at 5500 RPM's? :rockwoot::rockwoot:
The quest for 1000 HP just got a little closer.