Nicks Garage 383 build

That + .020" is the NHRA blueprint spec for Stock and Superstock, an untouched 68-9 HP 383 is about .025" to .030" in the hole.
Chrysler is the one that gave NHRA the spec, and actually..........they were all over the place. I tore down one that was untouched at .005 - .009 positive.