Any performance brand oil such as royal purple, Lucas, or vr1 racing oil 20-50 or 15-40 should be good to go. And for added insurance add a bottle of zinc additive for comp, edelbrock or eos from Chevrolet they sell it at most pep boys
The "good" oils that you have mentioned, and including others, including Brad Penn and Torco that I mentioned above already have proper amounts of zinc and phosphates, so there is no real good reason to use additional additives.
The additives are fine if someone wanted to choose to run a different oil that did not have the high levels of zinc and phosphates already included in it with a flat tappet cam. There is a point of diminished return in adding more, although it may be ok for the initial camshaft break in.
I have spoken to techs at several of the major oil companies, including Valvoline, Torco and Brad Penn, and have made the Brad Penn my oil of choice based on personal experience with the "old" Kendall GT 1 oil, which was the same as the current green Brad Penn oil. One of my other friends builds lots of sprint car engines, and that's all he will use as well, based on what the bearings, and particularly the rings look like after running.
