Crane Gold roller rockers(1.6) ,custom grind hyd cam (comp).574-.569 ,comp race series hyd lifters,comp springs matched to cam with retainers and locks. these made 400 hp in my 347 with afr 185s. Two dyno sessions and. three trips. I switched to solid roller stuff my loss is your gain. 500.00 I payed 970.00 for this stuff.