Removing belts on my 1977 Chevy Scottsdale - AC Compressor

[1977_LEROY]

I bought this 1977 Chevy Scottsdale without a AC Compressor belt installed. The mechanic (seller) told me he isn't sure if the compressor works at all or not. He thinks the compressor bearing may be worn out... the compressor belt wheel on the clutch assembly spins freely (not sure if it is suppose to do that or not). I figure the first step is to get a replacement belt on the AC compressor and see if the compressor engages. The issue is that I have to remove all the other belts on the engine to get to get this belt on. What is the easiest way to do this or does someone have a good reference site or youtube video to get me started. It doesn't look like their is any type of tensioner pulley on this system. It is the 5.7L V8, 350. Any help is greatly appreciated ladies and gents.

Also, note, factory AC - R12 system installed. I am not sure what i need to do to get this system retrofitted for R134A coolant.

Thanks again,