Distributor refresh gone wrong

Something to note about my distributor is that the correct replacement rotor is different than the one that is on there now. The replacement rotor won't even slide over the notch to seat correctly, so there is something fishy going on. But I'm just going to put all the old stuff back in and put it back to exactly how it was.

Take the rotor that used to work in the distributor to the parts store with you and match it to a new one and return the old one. If you have all kinds of extra points why aren't you using those?

This is getting more complicated than it needs to be. Go to NAPA or any other parts supplier that handles Echlin premium line points and condenser. That used to be a good brand but I can't testify to the quality today since I have run electronic since the 70's. Echlin warranties 3 years or 36,000 miles. This is not rocket science. Good luck.