Very Rough Idle at Startup '55 Caribbean

Posted by Marty or Marston On 2018/5/16 20:21:31

My '55 Caribbean has been running great up until the last several weeks. When starting the car when it is cold it has a severe erratic miss. It misses when started and runs very rough for 2 to 3 minutes and smooths out and goes away. If restarted while it is still warm, it runs nice. It feels like it might be getting to mush gas, but there is no black smoke coming out of the exhaust pipes.

Not wanting to tear into the carburetors and rebuild them, I checked the ignition areas first by replacing the coil, rotor, and points. The cap looked good and appears to be fairly new. I checked the timing and it was fine.
Any ideas of where the problem could besides rebuilding the carbs?