How much head milling = how much more compression?

I'm not asking what my current compression is (and 8.4 is what is listed in a 1973 Dodge shop manual, I know it is probably wrong). I am asking what the difference would be with a head sitting 0.060" lower. I know this number will vary some based on what the current actual measured compression is, but it should be a fairly constant figure across the range of likely compression ratios.

Surely someone here has measured their stock /6 and has all the numbers from their engine. Plug in a 60 thousands head cut and tell me what amount of change that would have made compared to whatever their stock head was.

Something like a 0.060" head lowering should improve compression by roughly 0.3 or 0.6 or whatever. That's the type of answer I am seeking.