Pertronix Test???

I recall reading something on the ZT website about them tapering the shafts for better air flow.

I don't know what is hanging up, although I suspect the linkage. It's just a matter of where and what to do about it. It usually happens at stop lights, so I can't exactly jump out and fiddle with it. I haven't had any time to work on either. I'll have to make time one of these days soon. At least it's driveable now.