I have an old 235 setup but it's for the old York compressor, if it was for the Sanden I would have used it by now. I'll look at it but if I remember correctly it fastens to two front headbolts on the left side that have a 7/16 or 1/2" stud sticking up from the hex head. You used a deep socket to tighten the headbolt and then the compressor mount base fit down over these studs and was held by a nut and lock washer. There is a diagonal brace from the outside of the base back down to the generator bracket or somewhere near there. I think it would not be a difficult job to make a bracket that mounted similarly but supported a modern compressor. Remembering about it I think it also has an idler arm and pulley on the base bracket for belt adjustment. Someone might have this setup, called a Mark 1V, but you would have a better chance of finding about it on a chevy car site that covers 62 and older. This one came off a 61 that had an add on air unit which was quite popular back then. If interested I'll try to dig it up and take a pic.
