In 56 (maybe late 55), they used the ceramic resistor on the firewall left of center above engine. The stomp starter was equipped with an extra side pole which was hot only while depressing the stomp pedal. It provided 12 volts to the coil (bypassing the resister) during starting to provide a more intense spark. Once the engine was running and the stomp pedal was released, the coil received the 6-9 volts from the resister. If you go with an internal resisted coil, you won't have this unique feature. If you have no problems starting using your internal resisted coil, I wouldn't worry about the switch with the extra pole/external resister deal. I am currently running a 235 with an external resister without the starter switch having the extra pole without any issues with starting.
Carl
