12v.conversion resistor

If using the original 6-Volt coil, you need to use the OEM ballast resistor PLUS a "converting resistor" of about 1.6 to 1.8 Ohms.

If using an aftermarket replacement "12-Volt" coil, typically they last longer, and point life is increased if "Dell's Trick Current Limiting Resistor" is used. This is two 1-Ohm 10 Watt wirewound ceramic resistors connected in parallel to make a 1/2 Ohm, 20 Watt resistor.

With the aftermarket "12-Volt" coil, use the 1/2 Ohm 20 Watt resistor ONLY. Bypass the OEM ballast resistor.

(Two 1 Ohm, 10 Watt ceramic power reistors, connected in parallel... the Radio Shack part # is # 271-131.)

Most ALL 9N front-mount square-can coils need a resistor or one type or another, even the ones labelled "12-Volts".

You can verify if it is ignition or "vapor lock" by checking for spark immediately after it has heated up, stopped running, and won't start.

I would have used "Dell's Trick Resistor ahead of the coil. The Pertronix folks are giving the OK to run without a resistor, based on what their MODULE will tolerate, and they must not have figured out what a delicate piece of @*$^ most of the generic "12-Volt square-can coils" are.

At this point, you can try adding the resistor, but the coil may have been overheated to the point where it is permanently damaged.

Then, you'll have to start over with a new coil AND a resistor.

I see no reason NOT to try "Dell's Resistor". The added resistance certainly will not cause any damage, the worst result with too much resistance will be weak spark, but the worst result of NOT enough resistance in the circuit will be a failed coil, and then, possibly a failed module.

it starts back up after a few minutes but only runs for a few more minutes and stalls again..... ....(melted insulative tar shorts out the coil windings)

if I leave it overnight it runs longer before stalling..... ..(wannna what overnite cooldown does to melted insulative tar?)

could this be vapor lock..... ...(you think its vapor lock? crack open yer tankcap but remember its very hard to vapor-lock a gravity fed fuel system)

it couldn't be the coil could it. (YES!!!)

If it were the coil it would just go out and not start again right?"..... ....(ignition coils are NOT like lightbulbs or fuses. They have eazy to overheat and melt insulative tars and shorts out the coil windings and cause weak sparkies and ultimately engine stops running until the tar hardens again)..... .....respectfully, Dell yer self-appointed sparkie-meister