"I brought it to a shop and they indicated that the #3 cylinder was not getting voltage in the low rpms."

I think we should focus on that. Electricity. I know you already fucked around with the distrib., but try replacing it with another. Weirder shit has happened than replacing a bad distrib with a new bad distrib.

Also, check the spark plug gaps. Proper tool: http://www.westmarine.com/webapp/wcs...8076&ref=81902

Gap should be 0.044