How close is good enough regarding installed height

I have a set of aluminum heads that I am building, and when measuring for Installed Height, I get 1.920; the spring recommended for my cam has an installed height of 1.8", So I am off by .120", but I will use a .060 spring locator, which leaves me .060 left. Can I run a shim with a locator? Is .060 worth messing with? what would you all do?

Thanks as always,