Exciter Wire with Early Regulator Setup

What do you mean "3 wire?" I would call the 69/ earlier setup a "2 wire" If you actually have a later alternator with 2 field terminals (isolated field, 70/ later) I would use the 70 / later regulator.

If the white is switched with igntion switch I would wire it to the regulator IGN terminal

Does this "Rebel" have a link to online destructions?

Simplified diagram of 70/ later

Dual_Field_Alternator_Wiring.jpg

Pre-70--original alternator grounded field cannot be insulated

pic1.png