3.910 + a few lines

RustyRatRod said
Yup. 3.910 would be the factory unworn bore and 3.912 would be the factory maximum before you need to bore it. So, if it's 3.9113, that's still below maximum spec. Although, not by a whole lot.

RustyRatRod said
So 3.9113 - 3.910 = .0013, or heading toward one and a half thousandths.

Then I need to finish measuring it and forget the machine shop and put it together.

I am looking for a commuter engine that will never see the race track. Valiant Propellant to go work, grocery shopping and back.