Just wanted to update. I managed to find a nice even flat washer and flipped the collar over. Roll pin hole wasn't centered. Had to sand a little on the collar, but finally got to about .007" Set gap on the pickup coil as best I could and put it back in. Timing is much better. Not jumping around like before. I still don't like the slop in the pick up coil pivot, so I'll still look for a new distributor, but at least I can drive her for now.

I'm almost tempted to get a GM HEI style. I'm not worried about the look and have always liked the all in one and robustness of GM HEI. If not, I'll do the HEI module mounted to the bottom of the distributor.