Which AC compressor for 134

[hogrocket]

I'm in the process of getting my factory air working. I've got everything hooked up except the compressor, which is missing. I'm converting to 134 refrigerant and am wandering if I should use a stock compressor for that era truck. Or can I use a more modern compressor. Is one compressor better than the other? If I do go with a newer one, can the belt/pulley system be converted to the standard V-belt? What makes one compressor better than another one? Any suggestions or recommendations for using the 134 in the system would be appreciated. Thanks, matt