Valve Spring Installed Height Variation

I don't think it's too uncommon for the intake and exhaust valves to end up at slightly different heights. It's pretty obvious when you lay a straight edge across all the stems and see light under every other stem. Comes from the valve seats being machined by different cutters in separate operations and the guy not hitting the same seat depth after the tool change for that valve and seat combo. For the springs it can be adjusted for by different shim packs for intake and exhaust. As long as it's .010-.015 it's probably nothing to worry about, but that will be variation in the pushrod geometry from one to the other. I've seen it on three sets of rebuilt iron or new aluminum heads. Just something else to rub the worry beads over.