Master Cylinder Adapter

Just realized that I attempted to start a similar thread a couple months ago. There were no responses, but in that post I see that my measurement for the Wilwood bore should be 1.48. In this thread my measurement shows 1.78. Also, I previously emailed Dr. Diff and they said their bore was 1.45 but when I talk to him on the phone the other day he measured his adapter and said it was 1.5. It looks like some measurement verification needs to be done. I'm away for a few days. I will call Wilwood on monday and triple check my measurement at home wednesday. I think the discrepancies in my measurements, 1.48 and 1.78 might
be do to the fact that the diameter is bigger immediately as it projects beyond the flange, for just a hair, then steps down. Maybe its my calipers. however, I wouldn't expect them to be that far off. You can see the slight step down on the side profile. Might need to zoom in a bit.