WICruiser, thanks for pointing in a direction to investigate! My current setup is completely stock, except for the Fenton headers. I have a rebuilt Rochester BC carburetor, stock intake manifold with heat from the Fenton headers through one of the online kits. The BC gets heat from the headers, as well. The ignition is completely stock. The distributor is original, the points and condensor were replaced with flaps parts. I'll take the plugs out to see if one is worse than the others. In the meantime, I'll keep plugging away on the bed.