Air conditioning options?

Tremendous help GAMoparMan. I have a remaining question about the crankshaft pulleys. I poked all over the web and can't find a good photo of a 1978 damper. As you show, the AC belt rides inside the alternator-w.p. belt, so the crank damper must have a pulley inward of the single groove on my 1964 damper (and spare 1974 engine). I suspect that is a special pulley that bolts to the inside of the damper, with a large hole to clear the timing cover snout. Or, perhaps the 1978 damper has 2 grooves and envelopes the timing snout. If I must change dampers, I wonder if it was balanced to the engine in 1978. My 1964 is a forged crank, internally balanced. I wonder about the 1974 since it has a heavy 2-groove bolt-on crank pulley with drill marks from apparent balancing. I do have the 1978 pulley (1 groove, light) that bolts on the outside of the damper, and your photos clearly show the Saginaw steering pump belt uses that.

I also have one long rear rod that I don't see in your photos. It has an adjustment slot to match the front one, so must bolt to the top rear Sanden hole. Should be in my photos of post 3 (old photos not showing in new software). Laying things in place, it looks like it would attach to an EGR hole on the intake (later engines), though doesn't seem like the smartest place to be applying forces. It does appear the bracket & compressor will barely clear the battery in my narrower 1964 engine bay (if at all), which may frustrate 65 Dartman too.