Longgone
John/68 Barracuda & Dart
I use Valvoline VR-1 but I`ve heard good things about the Brad Penn Green and the Joe Gibbs oil.
Schaeffer's Oil The original green oil, they were around back in the 1800's oiling all kinds of stuff from steam boats to wagons to earliest engines.
Started out red and turned green in the 1900's to present.
Richard petty racing uses schaeffer oil in all their race cars.
and it says 'for flat tappet cams' right on the bottle!
I`ve noticed that Valvoline is using that type of advertising too now, something like "safe or made / for flat tappet engines".