[steve s]

The answer to your question is, YES, I think so. I had one of those on-the-firewall regulators for many years although it was with a Delco generator with a modified bracket welded to fit. I don't know why the A generator wouldn't work. I had fried two previous A generators by pushing the 3rd brush to the max and then overcharging. Finally, my dad took it to an auto electric shop and told them to "fix this boy's car so he can drive it at night."

I remember we put a tractor armature in designed to start putting out at lower rpms. I think the original cutout might have been ok if I'd just driven with the headlights on during the day. In those days, my car had a tube radio, heater fan, sealed beam headlights, lots of other lights--worst case, total brown-out was to blow the horn during a sudden stop at night with heater and radio going. It doesn't take too much of that sort of screwing around to make you love alternators.