[supereal]

We use adjustable lifters with straight stem valves and one piece guides on rebuilds. They are from C&G, and will stay adjusted if you use the special wrench set sold there. Grinding mushroom stems for clearance properly requires a valve grinder and considerable experience to get square ends. It is easy to grind stems, but you can't add material if you go too far. Almost every valve job results in at least one noisy set. Using zinc rich break in oil for the first couple of hundred miles will allow the lifters to mate with the camshaft. If you have a noisy valve, it is easy to reset it without replacement. Use a go/no go feeler gauge for setting and checking.