[AZKen]

Jimmy, thanks for the clarification. Need to ask more questions.
1. Do you actually have a evaporator (under dash unit) from the 60's or a modern aftermarket one like Vintage air?
2. You are correct, the 60's unit would have probably been a York. Do you have a York?
3. Do you want a York or a rotary type? The evaporator does not care, but it's way different bracketry.
4. I see you want a 3 groove pulley, probably someone here has one. Put in a wanted in Marketplace.
5. John has designed and built brackets for V6. He may be able to build one for you regardless of compressor type.
6. If you state which type you want to use, we can try to find brackets. York brackets are hard to find but they are out there somewhere. May not be for a V6 but can be modified.
7. If your evaporator is an actual 60's unit, keep in mind it was for R12 and now the systems use R134. Just would need flushed.