1983 Chevrolet Truck Won't stay running.

First you have to figure out if you're losing fuel or spark. If you can't get any squirt from the nozzles in the carburetor when you work the throttle by hand, suspect a plugged pickup screen in the gas tank. Sometimes you can remove the inlet hose at the fuel pump and use compressed air in that hose to blow the sock off the pipe. Be sure to remove the gas cap first. Typically that will cause spitting and sputtering for a few seconds before it quits completely.

If you're losing spark, probably the most likely cause would be the pickup coil inside the distributor. The module or ignition coil could be intermittent too but those usually fail completely and don't work again when they cool down;... Usually.