Need Help Identifying This 3 Belt Crank Pully from A 273 Commando Engine With A/C

Keith,
That Acme pulley is a quite rare aftermarket adapter. It is cast in a foundry by the Acme corporation that is not a subsidiary of the Chrysler corporation. In the 60's as we all know it was not as common to have air conditioning as a standard option on a car as it is today. And we also all know Air temp was the Chrysler subsidiary... So what happened here is the dealerships had a boat load of cars without factory air and customers that wanted those cars with air. So the dealerships scrambled to install air at the dealership in any way they could based upon what the individual owner of the dealership decided. They are not impossible to find but not as common as factory installed crank pulleys. You will find these ACME aftermarket pullies on Mopar, Ford, General Motors tractors etc. I wouldnt be surprised if you found one on a windmill or hit or miss pump. So if you have a chance to snag one get it my friend!