Ac compressor with air gap intake

I have an Eddie air gap and want to put air in my 70 dart 340. The engine came with ac pulleys and I can get an original compressor or try the one that comes with the classic air kit. I hear there is an interference with the air gap. Is this with both original ac or the Sandin. If there is a problem can you direct me to the solution. Old threads are fine if that is the best way. Also, thinking Vintage or Classic.