If you already have a sanden installed it would be easy to swap it for another sanden. Was not sure that all Sandens could use the same hardware for mounting and if clutch/pulley assemblies were interchangeable throughout the Sanden line. My compressor came off the same 85 Diplomat that I got a cop car steering box and 915J heads from. The expansion valve is probably the part with sensor, that along with the drier should be replaced. They can both be purchased cheap. Good to know. There is also a heater valve in the heater hose that is hard to find, but you can sub a manual valve if you need to and turn it off in the summers. You are talking about the heater shut-off valve usually located on the passenger side splash shield. The one near an accumulator with a vacuum line going into it? I have found several kinds of these in the market. No problem getting one as long as appearance isn't an issue. I have two that work for my requirements.
I put a dynamat clone from amazon every where I could stick it when I had the interior out. Put it in the trunk too. Really quiets the car down.
