Ok, here is the latest update on the alternator. My bad gear driven alternator has 50 on the ID tag. I received a lot newer donor 50DN alternator which is pulley driven (90s vintage). I pulled the field out of it which has 3.3 ohms of resistance.
I see that my 50 alternator has one field stud only. The 50DN has two field studs, F1 and F2 which are both ends of the winding wire. F1 is the outside or "end" of the winding and F2 is the inside or "start" of the winding. The F2 stud was grounded with a ground strap.
I'm assuming the 50 alternator's field has one wire to the F1 stud and the other wire connected to ground on the inside of the alternator. I will have to use the diode frame and cover from the 50DN because the field is different.
I was told that I have to make sure the ground strap is hooked up the same way as my old alternator or it won't work but which stud do I hook the strap up to? Wait and see which end of the winding is connected to what and follow suit?
Thanks for your input everyone!