I picked up an 8-3/4 rear, and a complete disc setup for the front, including dual res master cylinder and prop valve, so the old single master cylinder is going
That's welcome news on the brake upgrade. Now back to the wiring. Look over your existing wiring and see if the old wires are still there for the alternator and the field terminal. Also look over the entire harness for any signs that it has been spliced into and butchered up. I have an engine forward wiring harness that was removed from a 66 Valiant, if you are in need of it let me know. It will get you back to the stock wiring setup, which is just to baseline where to start from, then you can upgrade from there. If yours is in good condition and the wires have just been laid aside, that's even better. Returning to the stock wiring setup is easy, and doing the upgrade to the dual field alternator and newer voltage regulator is also a snap. Mullinax, I didn't check your wiring diagram, but I'm sure it's what fstforward is needing to put him on the right track. Thanks for sharing, we'll get this right before the 340's ready for sure. Fst, what headers are you planning on running with the 340? Geof