Well OK, I guess I need to keep pounding this "nail" . . . . . .Once again, down the same rabbit hole . . . . . . Well, I confess: I'm getting tired of a being a "racing engine coroner". . . "It's like deja vu, all over again." Yogi BerraI've seen a few cams lately that did not die . . . . They were killed. Absolutely a case of "murder" by their well intentioned builders/owners. MOST Vintage and Historic racing engines use flat tappet camshafts. It is just what was used "back in the day". These items require different lubrication and "bed-in" Vs modern roller tappet camshafts. A LOT DIFFERENT. Read this ad from Driven Performance, published in the January 2015 issue of Engine Builder magazine.
If you are having problems with cam/tappet failure, let me know and I'll post my procedure to resolve these issues. Be aware though, that it IS NOT a simple procedure and your particular problem MIGHT require a more complicated "fix".
BTW, Joe Gibbs/Driven is what I use and recommend for most flat tappet camshaft engines. YES, it IS expensive.
BUT, what is your cost for a new cam and tappets? And what is your cost for the other, inevitable engine damage that occurs when your camshaft fails?
It's your choice . . . . . . but it's kinda like the old Fram filters commercial: "You can pay someone now, or you can pay someone later."
Coronerboy