Re: Engine Wiring Harness - What to do with unused wires?
If you have the room in the wire gutter, I would leave them in there just in case you ever decide to convert back to original. You can cut just the end connectors so you have more room and install new ones when you decide to use them. I said I would never go back to original ignition wiring and you guessed it, just finished it this year.
69 Z/28. 302DZ, Autogear M22, Red w/black stripes.
69 Camaro, ZZ4, 700R4, 8.5 3:42 posi, X11
70 Nova SS 396, 4sp, 3:55 12 bolt