Air conditioning options?

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.

It is exactly as you described; I have an extra inside pulley if needed.

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.

I hope it will clear; if not I have a back-up plan: I have what I believe is a nicely made homemade bracket assembly that I acquired from another member that looks like it places the compressor closer to the head. We shall see!