Don't know if you're currently using or thinking of electric radiator fans like the 2 fan kit from MSA. If you are you need a Sanden compressor mounted low. I had a dealer installed AC in my '71 240 with the old York compressor and there was no way to go to electric fans for the radiator. Found this on Ebay;
https://www.ebay.com/i/152578331358?chn=ps&dispItem=1
Compressor mounts low so it's out of the way of the fans. Yes, my smog pump has been removed and I run the MSA 6 to 1 headers. My fans are now installed on the 3 row Champion radiator (the MSA kit) with this compressor kit. The compressor comes with mounting plate, belt tension arm and bolts to put on your block. Neither belt they sent would work, so I did have to buy a different belt than they sent. Other than that it fit perfectly.