Joker, I believe that there were still points in '73, so no ignition module unless the distributor was replaced with an HEI.
First and foremost. The next time it dies, pull the air cleaner and look down the throttle plates. If you see fuel when you move the throttle lever, it is electrical. If you dont see fuel its fuel related.
If its ignition related it could be any of the following: coil, plugs, wires or ignition switch
If its fuel related it could be any of the following: vapor lock, plugged fuel filter, plugged carb passage, bad float, bad needle & seat, bad dual tank valve.
