1 - valve springs were Ferrea's recommendedation - I hope they were good.
2 - How do I identify minimal harmonics? Typical race RPM is 5800-6500, with occasional 6800-7100. Engine does have harmonic balancer, came with engine, do not know specs. Engine is SII, on center, even fire.
3 - by "valve side of the fulcrum" do you mean minimizing weight of the valve etc? Or something else?
4 - I do have 3/8" diam pushrods.
Appreciate your help so far.