1966 Valiant Engine wiring harness

AFAIK there is one manufacture that makes pretty good quality reproduction harnesses.
But they are not cheap. But if its just the engine harness, maybe its within your budget.
I don't know who, if anyone retails them in Canada. But for a sense of price go to Year One's website and look up a '66 Engine compartment harness. Year One has or had an exclusive on the many of the Chrysler engine harnesses from M&H. Probably 'cause they fronted some money.

HOWEVER. Your car needs a wiring hareness for a '66 Canadian Valiant. So if the price is in your ballpark, then contact M&H since I doubt Canadian version will be in YO's inventory.

Alternatively you can fix what you have. Its not cheap, but probably less than any harness made for you. The paint won't generally hurt the insulation. The colors for the engine compartment harness aren't that hard to figure out on a '66.

You'll need wire strippers, open barrel crimpers, some heat shrink and some Packard 58 and maybe some 56 terminals probably for 18, 16, 14, and 12 gage wire depending on which wires need repair.

I'd suggest also some harness tape and some cleaning materials too. You may or may not need more wire. Assess the situation first. From what I see in the photos there's mostly just bad terminal repairs. As long as there is enough length in the wires not to be stressed, and they can get properly supported, then the only other concern will be if the conductor is oxidized under the insulation.