Air conditioning options?

Fooling with the Sanden brackets today. To see how they install, I found just 2 photos on the web - a 78 Volare slant wagon and a 78 Volare engine in a 99 Durango (not kidding). About all they show is the clocking of the bracket on the water pump and where the compressor sat. Note that both use the inner compressor groove, and the 2 Sanden's look different w/ different hose connections.

I didn't have my camera when I took the brackets off a Volare at PickNPull a few years ago. I vaguely recall a smog pump (likely for CA). I pulled the crank and w.p. pulleys too. The crank had a single-groove pulley, which gives 2 crank grooves total when mated to the damper. It fit my 64 slant after slight filing of the hub to fit in the damper hole (clears crank bolt). The w.p. pulley is 1 groove and exactly like my 64 pulley. I suspect the inner belt ran the alt & w.p. (like my 64) and the outer belt ran the Sanden, pwr. steering pump, and perhaps smog pump. Perhaps I can find a shorter belt to work w/o a smog pump and not interfere with something. Kicking myself for not grabbing the grubby Saginaw p.s. pump bracket at PickNPull, just in case I change to p.s. later.

BTW, the 78 crank pulley is much lighter than the 2 groove bolt-on pulley on my spare 74 slant engine (from Dart?). That pulley has a similar projecting hub but very thick and the crank bolt acts on it. Also has drilled holes that look like from balancing. Perhaps 74 has a cast crank that requires external balance. That setup gives 3 crank grooves total, which matches my 69 Dart slant that had 3 belts - alt & w.p., pwr steering, AC. The 74 crank pulley mounts w/ just 3 bolts. The 78 pulley has 5 holes, but I had only 3 bolts w/ it in the bag, so likely only used 3 (I installed w/ 5).