my slant buildup

I have a thread over on .org about this same build, and back when I was debating on which cam to run, etc there were a few posts on spring choice with a member there who I don't believe is over here. I'm not an expert in valve spring, but among other things, I had thought that the tendencies were towards lighter spring tension due to the elimination of zinc in oils that is important for flat tappets, and power loss due to all that tension, power that it takes to spin a cam with heavier springs.is there a rule of thumb somewhere that ties lift, duration, expected rpms,etc together to help make spring choice easier?
Unless these bind as I spin it on the stand or something like that, I'm gonna run with what I have and see what happens.