Aftermarket distributor install question

Hi all,

New to this forum. I was hoping maybe to get a little help.

I am installing an MSD distributor in my 1973 Challenger. Originally a 318 car, converted to 440 6-pack and about 500hp. Originally had the 318 distributor in, but the increase in HP leads me to believe I will need more spark, so I have purchased the upgrade.

I know I need to run full 12V to the new coil on the Ign. 1 circuit (hot on start and run). The question I have is what color is Ign. 1 wire, and what can I...

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Author: DonB