Griffin radiator and twin fans still running at 190-200?

You have to add up all the amps used by the system. Lights, heater, fuel pump, fans, ignition and any other electrical components. Then you add a safety margin and pick an alternator.

65 amps is pretty puny by today's standards.
Fans!22
Water pump 5
Fuel pump 1
ignition 4 or .7 per 1k
O2 sensor 1?
Tac it's light and the little water- oil-voltage gages 2?