Rotella is NOT what you want to run in a flat tappet cammed engine
Oop's my bad I hadn't looked in a while guess I figured they would leave it in for the sake of the diesel engines,but i guess they have to meet regulations too.Don I get planning a roller for a new build,but i find it hard to justify pulling apart a perfectly good engine to do a retrofit,especially if you're happy with the performance of the present setup.Jim's right,neither Delo,or Rotella have zinc in there anymore.Of course,if one went with a roller lifter set up,you wouldn't need to buy "trick" oils or additives for your engine anyway.
Uuh Don would you add 10w-30 Valvoline Racing oil pleaseStay away from any diesel oil,period.Use Gibbs,Brad Penn,Amzoil,Lucas hot rod oils.If your bearimg clearences are .003 or less,a 10w-30 is all that you'll need for a street engine.