Guys;

Thank you Champ6 for making the most sense and voicing what I thought of first also (logic dictates that the FIRST thing to suspect after something has been changed - new fuel added in this case - should be thoroughly checked...it wouldn't be the first time a pump pushed out water, and BTW charged you dearly for it!)...while I don't discount Bill's point, I personally believe the "wobbly distributor shaft" has gotten WAAAAYYYYY too much bad press (and likely caused the recycling of many a distributor before its day), and I further agree with Champ here that it sure as hell wouldn't all of a sudden cause the symptoms experienced, and to that extent...it takes literally thousands of miles and years of wear to wear a distributor to the extent that it would cause the symptoms, and the problems it can cause sure wouldn't come on in a flash as these have...those few degrees which the timing moves because of shaftwear will not even be detectable without a timing light...the points spring keeps any slop in the shaft loaded up anyway...you will feel it when wiggling the shaft by hand, sure, but it has little to do with what happens in use...

Cheers