Modifying an electronic ignition wiring harness

[QQBlue1]

I need to replace the engine wiring harness on my 68 Charger with a small block. The harness looks fairly original with some mods over the years such as the MSD distributor I added and auxiliary temp, oil and alternator gauges. Also, still have the ballast resistor wired in, a voltage regulator and the alternator with one field, the round type not a square back. It's a pretty simply set up. Everything under the dash is a stock replacement harness I installed about 12 years ago.

I have the wiring harness for a big block w/ an electronic ignition sitting on my shelf. Would I run into problems modifying that harness or would I be better off buying the correct harness? Thanks!

 

[Bird 426]

The electronic conversion is not without it's obstacles. From a 2 pole ballast to a 4 pole, electronic voltage regulator, square back alt. The Mopar ign module plug in is obviously there for the module. Leads plug directly into a Mopar distributor. Not sure if a big block harness is going to have the leads in the correct positions, but if your modifying it, it should work. I am electrically challenged, I took the easy way out, it was plug and play, almost, '69 Dart.

 

[PurpleBeeper]

I need to replace the engine wiring harness on my 68 Charger with a small block. The harness looks fairly original with some mods over the years such as the MSD distributor I added and auxiliary temp, oil and alternator gauges. Also, still have the ballast resistor wired in, a voltage regulator and the alternator with one field, the round type not a square back. It's a pretty simply set up. Everything under the dash is a stock replacement harness I installed about 12 years ago.

I have the wiring harness for a big block w/ an electronic ignition sitting on my shelf. Would I run into problems modifying that harness or would I be better off buying the correct harness? Thanks!

Modify the correct aftermarket wiring harness (my 2-cents).

 

[493 Mike]

I always like to fabricate my own. I do not understand why so many folks are ignorant to the wiring (of cars or houses). It is not "rocket science" and many sources of educational materials are available to learn from.
Mike

 

[jimbosride]

Evans Wiring Harnesses

Works great on my last restoration when I converted to electronic ignition .

 

[Nacho-RT74]

Modify a BB harness to become on a SB harness is easier than backwards. The differences are coil and dist location, so doesn’t even need to cut the wires on this case, just untape the harness get the propper terminals to the rear of the engine hiding the excess down the new tape layer.