oldschol Erson with the correct length pushrods(custom from Smith) and limiters in the
oil ports to them of .080". No failures in 4 years of racing. Have used Dove and this speaks for itself on other threads here.
Know of others running H&S and have not had any problems with the bronze bushing ones. The wear and tear on your question also has alot to do with picking a rockerarm. Size of camshaft and rpm range.
Erson are bolt on without any machine work to head.
If money is not a problem, the heads are off the motor. The best are T&D or Jesel setup. Can take anything you through at them. .800"+ lift camshafts, 900 pound valve springs and the list goes on. The oiling system in your motor will need to be changed to push rod oiling with either of these to products.
I run Erson and are they happy with them. They cost more than Dove, H&S, Comp and some of the others. I do think the engineering is also better with 2 solid mounted supports than 4 single ones. Which ever ones you end up with, make sure you have a straight edge and lay it across all for mount holes and they are even in height. If not you may have to shim the stands. This is why some rocker shafts break if mounts are not even. Also make sure that ther are no pushrods hitting the holes in the manifold, same with the back of the rocker arm, check for clearance with a complete rotation of 360 degrees on the camshaft. I also like complete roller rocker arms, not just the tips. It seams to defeat the idea of running rollers. I race and the bearings are holding up just fine. I hope you are running an HVHP
oil pump with a min. of 60 psi spring. IMO 80 psi is better for an FE motor even on the street. Also running 1 extra quart of
oil in the motor is a good idea, even for street. Rick L.