Depending on the valve/rocker wipe I need to remove the pedestal shim which would raise the arm above horizontal, ideal, when the valve is closed. However I believe, according to the engine builder, there isn't any adjustment on the arm to achieve the correct tappet clearance.
As I said, subject to the contact pattern, I think I need a slightly shorter push rod which would lower the tappet screw and give me clearance under the rocker cover and also give a more ideal rocker arm arc?
Iain