I hate to be the one that breaks the news to you but the pushrods will never live with cups if you run valve spring pressures over 500lbs open. I live right here were they make T&D rockers and I have had nothing but good luck with T&D. They took my B1-BS headed 451 that has a set of Erson Rocker arms and put a adjuster cup in the rocker arms and I went to ball ball pushrods.........no more problems.

My 498 B1-BS has 5/8" shaft T&D's that are pushrod oiled this setup is the best of the best.