Flywheel specs

i scoured the all of the FSM's i have at my disposal (65, 69 & 74) and could not find a mention in any of those for min. thickness. surprisingly they only list run out and flat on the wheel and pressure plate.

i looked at the three i have here (70's /6 122T and 65/66 122T as well as a 67+ 130T) and not one of them has any min. thick markings on them.

i would *guess* that as long as you still have the depth in the holes for proper engagement of the bolts that attach the pressure plate you should be okay? what that is, i don't know... .040? .060?