I see you are in Florida so you can discard the ballast resistor and just use a resistor type coil. The exceptions are if your truck runs real hot or you don't keep it well tuned. My 37 Buick has been this way for over 30 years but it does have the 6v starter which really spins it over fast. In areas where it gets cold the 12v by-pass while cranking is needed but not in Florida.


Evan