Unfortunately I’m not sure anybody sells a complete ready to go kit for cucvs anymore, Nostalgic air has been out of stock for the cucv kit for a while now. The problem comes when trying to mount the compressor and keep both alternators as I don’t believe a 24v squarebody setup is made anymore.
You could convert to 12V and find stock 6.2 compressor brackets and adapt from there, or I’ve seen on here someone (I believe 79vette) fab a custom compressor bracket that mounts to the drivers side alt. Or switch to 12V serpentine belt and run 6.5 compressor brackets.
Once you get the compressor mounted the rest of the aftermarket kit should fit.