I would have guessed Idle circuit on Carburetor but I also don't believe in coincidences. So All I can say is try going back to the old coil & see what happens.
ok i must be a moron. whats the idle circuit? Ran fine again today. I noticed my heater hoses were resting on coil too. moved coil over a bit. still have the mallory on. what do you guys use for coil?