It sounds like the condenser is a good thing to check and the fuel filter; is it correctly installed directionally? I would check coil output when the engine stops to see if the coil has an "open" winding after it warms up. The float bowl in the holly might not be filling. Carbureators can be very tempermental, could be the floats ar eout of adjustment.


1999 GMC Yukon
1957 GMC 100 Panel