Internal Reg.alternator on 69 valiant?

That squareback alternator doesn’t have an internal voltage regulator.

I like to take alternators and starters to a local rebuild shop and keep,the correct parts on the car.
I want to keep it original as well. I’ll likely rebuild the round back one that was on it. I just wanted to know if this one would work. If it doesn’t need mods I’d put it on for now so I can put some miles on it before the winter hits and to give me time to rebuild it. Thanks