Nu-REX upper distributor plate question...

[halpeters]

I have a stock distributor, and I just purchased a new "NU-REX" upper distributor plate, with modern points and condenser.

The existing plate had modern points, but the friction arm, instead of a wire to make contact with the lower plate. The lower plate that was in it was wood with a copper contact pad, but that is another story, and now has been replaced with a NU-REX lower plate, and wire.

My problem is the new NU-REX upper plate will not fit over the distributor shaft, and the inner hole is considerably smaller than the upper plate that was in the car.

The inner hole diameter on NU-REX is 0.720 inches, and the old plate is 0.760 inches, and easily fits over the shaft.

My questions are:

1. What is the correct diameter of the distributor shaft where the distributor sits?

2. Is the 0.720 inch inside hole diameter on NU-REX upper plate correct?

3. Is there something I'm missing?

The good news, is I was able to use the old upper plate, with the new lower late and wire, so i am running....

I appreciate everyone's help!!

Hal