Small Block Pulleys

I believe the previous owner must have already switched to a shorter belt running from the alternator. Everything seems to function normally and there is no idler pulley in the line currently. I think he just left the AC compressor on in case he ever decided to hook it back up and maybe because it appears that the alternator mount is incorporated into the AC compressor mount. All things being equal, could I take off the compressor and find a mounting spacer for the alternator that retains the alignment that is working right now?