stalling-ignition
From your descripton, it has symtoms of high electrical resistance.
The resistor- carefully inspect the coiled wire for breaks or weak areas. This coil heats up, lowers the 12 v to something less so the points last longer. The usual symtom is it it gets hot, so the paint might be discolored around it as well. You can temporarily by pass it by running the supply wire directly to the + side of the coil. Your points won't last long, but it will run til you get a resistor or change the coil to a resistor coil. ( Maybe a few hundred miles.)
The coil- same thing- sometimes when failing- it gets hot. This would normally go out, gradually supplying less and less current to fire the plugs. Sometimes they deform slightly and or leak oil.
A meter, checking continuity and resistance would tell the tale.
If the points are burned, it's likely the condensor.
All of these items aren't terribly expensive.