I purchased a compressor for my 84 300D, waiting to hear what year it came off of, and it a Delco 1131350. I'm down to connecting the HS/LS lines to the back of the compressor and ran into an issue.

The seals for the lines to the compressor differ. My old compressor had a step/recess for the seals. The kind that id you search for you can find easily. The new/used compressor appears to be made for large o-rings.

Does anyone know the o-ring size/number so I can procure one?