What do you have to do to replace thermostat on 500ci 76 sedan deville?
move air conditioning compressor or is there some easier way?

help!!!

Try a distributor wrench, usually works. Worst case, loosen belts and remove compressor mounting bolts and move compressor just a little to get access. No need to disconnect anything to compressor.

what he said either use a wobble on a socket or mave the compressor off to the side. its easier than it sounds