Harmonic balancer inside diameter

I got about 1.533 on my crankshaft with my digital harbor freight calipers. The Summit Racing stock OE harmonic balancer was a few thousands smaller than that. It went on snugly, but not too hard. On hindsight I think I should have put a dab of RTV on the woodruff key before installing it, I think I was getting some oil leakage there on the old one, maybe the new one will be tighter.