Once started and I begin to drive, it sounds like the motor is backfiring through the carb. It coughs and bacfires once or twice while I'm giggling with the choke knob. Once the choke is out a bit it usually stops. Once the engine is hot I push the choke all the way back in. Occasionally when I'm pulling up a hill it backfires again until I pull out the choke slightly. Do I need to adjust the distributor or make an adjustment on the carb. I know very little about how a carb works.

Thanks for any suggestions why it's backfiring.

Spot

Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod