Hello all, I'm sure this as been asked a million times. I can't seem to find anything helpful. I pulled the tired flathead out of my 1939 Ford and dropped in a small block chevy. The flathead was all stock, stock wiring, 6v, positive ground with a generator and voltage regulator and firewall mounted solenoid. My question is, using the stock ignition and charging wiring, what get connected to where and what gets abandoned and what do I need to add ? I also would like to continue to use the stock column kill switch and dash mounted starter*****on? Any advise would be greatly appreciated! Eddie aka Chano64
Rebel Wiring. Rebel Wire .:. Wire kits .:. Wiring Harness .:. Connectors and Accessories for Real Rods And they are an Alliance vendor. There are other sources for wiring kits as well. Bottom line is don't try to splice, patch, or other wise jury rig the wiring. Rip it all out and start from scratch and convert to 12 volt negative ground when you do it. When it's all said and done you'll be glad you did. JMO And they have great tech support.
For the two past weekend's, I have been*****ered into sorting electrical issues on 40 year old cars that have been patched into by clueless people over the years. Much easier just starting from scratch. Rip that old harness out.
If your existing wiring is in good condition, there's no reason it can't be re-used, it's plenty big enough. You have to change out all the lamps of course, plus any motors or other 6V items to 12V pieces. All existing switches will be OK except as noted below. You will have to make some wiring changes; switch to 12V negative ground, use either a 3 Ohm primary coil or install a 1.5 Ohm ballast resistor in series with the power feed to the coil. You will need to change out the solenoid for a Ford 12V unit, jumper the two terminals on the Chevy starter together, and switch out the starter push*****on for a non-grounding type with two terminals. If you get a solenoid with 'S' and 'I' terminals, add a wire from the 'I' terminal to the coil side of the ballast resistor. This will aid with starting and you won't need a 3 Ohm coil. Connect switched 12V power to the second terminal at the push*****on. For the charging system, the wire that connects to the 'A' or 'Arm' terminal on your generator will re-connect to the output connection on the new generator or alternator. If you use a charging system with an external regulator, you'll need to install the regulator-to-generator/alternator wiring.
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