833 Transmission won't disengage at stop after 100 miles.
I'm assuming the finger height should be measured with the PP torqued down to the flywheel, and the shaft of my dial calipers will be touching the friction plate. Is there an acceptable variance for proper clutch operation?
No, just to see how close it is, you can do this on any flat surface . But I don't think you will be able to use a caliper, as the fingers have a curved surface. You can hunt up a deep socket and a crosspiece with a couple of shims and that will get you close.
Alternatively, I guess you could float a flat disc over the fingers and caliper it, adjacent to the fingers. If you you do it as I imagine it,lol, that will get you real close.