Almost non existent valve stem and valve guide wear, just like any other application. That's why I am going with the modified Buick straight eight rockers. Already talked to Gary about it. As suspected, he's already done some and they do work. He wants to rework not only the shaft bore, but also the adjuster screw bore. I'm going to let him rework the shaft bore, but I am not going as far as reworking the adjuster screw hole. I gotta draw the line somewhere with a budget.
