I guess that would be part of the question,as I have not yet purchased rockers, springs or pushrods.Trying not to build a valvetrain killer.I am considering Hughes cryo treated rockers,and possibly Comp conical springs and related retainers, hopefully avoiding rocker/retainer clearance problems.I'm trying to purchase effectively, one time,as financially I am really reaching to do this and would like feedback from all with experience here.All response welcomed and appreciated. Thanks,Bill