Use the square HEI e-coils in place of the old style yellow One above.
Wire to straight 12 volts, no ballast resistor.
These are a nice style E-coil with the 2 spades for + & - hookup.
'95 Ford F150 at Rockauto, work great. The e-coil is what gives it the quick starts and helps keep the plugs burning Cleaner.
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