I looked into swapping a Sandeen compressor in place of the stock GM one. After sitting around for a few years without lines I didnt think it would work. Low and behold it actually did. But anyways..
There really isnt any room for a sanden compressor with the current setup. Theres 2 basic setups for C/T brackets from what Ive seen. And neither work. The 79/80 setup is the worst I think. There just isnt much room to put anything. Cant put it anywhere really besides where it is, and the sanden is so long it hits the exhaust. I measured, its like 2 inches too long. The only other real way it could be done is to put it on the drivers side above the power steering pump, but thats not really any better.
After looking around, I just ended up ordering some fittings from NAPA and built my lines.
Why are you looking to go to a Sanden? I know its a way better pump but it isnt exactly easy to find a spot to put the thing.