electrical problem i think?

Make sure your module and engine have a good solid ground to the chassis. Start the engine, look at all your ignition wiring for arcing (sparks), listen for popping sounds (arcing). now wiggle the wires going to the ballast resistor, ignition module, distributor, and coil.
You might have a vacuum leak, while your listening for popping sounds, also listen for hissing sounds. Get a spray bottle with water in it, squirt some around the base of the carb,(NOT into it) all the vacuum lines, and where the intake manifold bolts to the head. during this entire process (wires and vacuum) , listen for any changes in the engine
Good luck