67 barracuda with a 383, need help!

There are so many unknowns here.

But I can tell you that when I started reading your post before I got to electric fan I thought he has electric fans.

Just lookup in the parts book for your year car and research the pulleys, the water pump, the fan and the radiator and shroud for HP cooling / AC cooling.

And start looking for the parts, whether used or rebuilt or new.

Basically the factory would not make a car that could not survive in stop and go trafic in so cal or Arizona for that mater.