I don't know if I have a flat tappet cam in my engine. I bought it in 2005 and it's a 64 block. No clue as to what the internals are. I don't want to add zinc and have it mess something up. Looks like it has a bit more than conventional Valvoline 10w30, but not way up there.
.???
You've owned the car for 12 years and you don't know? You could simply remove a valve cover and inspect.
I don't understand your last statement "Looks like it has a bit more than conventional Valvoline 10w30, but not way up there." At all.
