If anybody has installed a Vintage Air set up on a 67 Cutlass I would like to know what unit you used and did you use their compressor mounting bracket that they have for 68 up?

 

I can't speak to Vintage Air, but I installed a Sanden compressor on the 455 in my 67 Delta using the kit from Original Auto Air. The bracket is especially well designed and has sufficient adjustability to line the compressor pulley up with any of the three grooves in the crank pulley, depending on what you need.