Stroker,
Thanks for the input. I modified the weights that I'm using to get an extra 4 degrees of mechanical advance. My system for modifying them could be considered crude. I removed and reinstalled them about 6 times before I got them to advance as far as I wanted. BUT, I have another three sets of sets. I'll try another set, unmodified, and see if the problem is gone.
My goal was attempting to get away from such a high intial timing setting.