I found something interesting: the larger "can" says it's a goniometer.......now the concept of a goniometer is simple enough, but how to drive/read it as built for an aircraft instrument? I do not know. Or could it be just another synchro in use as a resolver, and King just called it a goniometer because it falls under the broad definition of a goniometer?
Here are the skinnies:
Part no: 066-3017-00
Big synchro: KR 148-0016-00
Scot P/N: 11HCW5-001
Small synchro(?): KR 148-5002-01
Scot P/N: 10SM5-001
12v 175hz SM (this threw me off...does not sound like a standard aircraft synchro)
I may yet end up sticking a stepper motor in this thing, but it would sure be awesome if I could make it work as-is.