Restore factory ac or go aftermarket

Hi,

Nice looking car. It looks like you still have the original A/C crank pulley on there. On a 72 318, the compressor and alternator shared the same two drive belts with the alternator acting as the idler/ tension adjustment. The trick with any aftermarket A/C system or non-original compressor you might choose will be to get compressor brackets that will allow the compressor to line up with the original pulley belt slots.