[blykins]

Vic Jr's are pretty nice out of the box and flow pretty well.

I wouldn't use a flat tappet cam myself...in fact I don't think I ever will. It's getting harder and harder to do a fresh startup without wiping the lobes off the cam. GM is discontinuing their EOS additive, which used to be a big necessity in breaking in a cam.

From a performance perspective and a reliability perspective, I'd go with a hydraulilc roller. It may cost some extra money, but turning the key without cam worries is worth the cost to me.

Let me know what pistons you're planning to use and I'll run a few numbers for you.