GrandpasDream
Member
Stepping away from the question about if it originally had A/C or not...
You said everything has been rebuilt, so I assume it all going to run well. If the fan is there (probably not a clutch fan) and the car is running right, there's no reason to expect it to overheat.
Put a water temperature gauge in the car and just keep an eye on it. These cars aren't that fragile that you have to worry about ruining it by getting a little hot.
If you have it for a while and decide to put a larger radiator in it, that's great... but you have it just like it left the factory years ago.... Just finish it and take it out and enjoy it.
The only real mod from factory is that I went from a 2 barrel to a 4 barrel Intake and carb, everything else is as it was.