The truck has a two groove damper already, maybe I lucked out there. The vintage air backet is set up to utilise a two groove compressor with the front groove running off of the rear groove on the damper, the rear groove on the compressor to run a short belt to the alternator above it. So the front groove on damper can run P/S pump. Any clues where I might find a pic of the car setup with P/S? Thanks to all for your help so far, it's starting to make sense.
