Ok that makes a lot of sense. I think I'll buy the electric and hook the positive up the ballast and then the negative to the engine block or carb for ground.

This is the first I have worked with a carb before and surprised and how much time I am spending with it. I am not familiar with the carburetor solenoid. A quick google isn't turning up much on it. Maybe it also goes by a different name? Is this more of a option or a must have for the car to run correct.