I use Joe Gibbs hotrod 10w30 oil
All I run in Mine also......But then, we're old guys, with old skool style parts, etc. IF it's a flat tappet cam with old heads with no hardened exhaust valve inserts installed for no-lead fuel, (Hydraulic or solid), then the Joe Gibbs or the Royal Purple is the stuff to run (That has the high Zinc and polymer content in it).
Old Leaded gas, GREAT for exhaust valves and seats. Unleaded gas, well, no so good, hence the hardened seat inserts. BUT, the Hot Rod oil, and Royal Purple, can help circumvent that part as well as adding the Zinc loaded components to help with cam/lifter wear and tear that is missing from oils these days due to roller cams, etc, being the norm since the early 90's.

Ray