An intermittent connection in the ignition wiring could also cause what you're experiencing. It would be like the points opening prematurely and firing a spark plug too early. Worth checking as well as the carburetor. I had a truck at one time that would backfire and die. I replaced the resistance wire from the ignition switch to the coil before determining that the coil connection (slip-on type) was loose. A quick squeeze with pliers fixed it.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.