[H. L. Chauvin]

FWIW:

In addition to above reply no. 7:

My 1930 Briggs Town Sedan's newly installed, (10 years ago) valves, are "stainless steel".

Whether valves are "original" steel, or "stainless" steel; and whether the cam is an "original new" cam, or a "used" A cam, B cam, or 330 Stipe cam, the old reliable setting of INT @ 0.011"; and EX @ 0.013" works every time for both cars and marine racing boat engines.