Thanks Andrew. I will measure the one that I have for comparison.
Maybe the better question would be, How much compression there should be on the pressure plate to minimize slipage? Is there a spec for that?
65 Mustang, 200 I6, CI 264 110* cam, DSII, Offy 3x1 w/triple webbers, pacemaker dual out header, 2" dual exaust, T5.