The belt is definitely to wide for the AC pulley but looks like it fits the WP and crank pulleys....compressor must be for a different vehicle. If the WP and crank pulleys are a "V" to the bottom,you could probably get by with a narrower belt.

 

Is the squeal all the time, and as soon as you start up the engine? Have you tried this with the A/C switched off, or with the compressor disconnected from the wiring?
Just wondering if it is in fact the A/C and not the alternator instead. Most squealing comes from the alternator which is why I asked earlier about what type you had. Can you post up a more complete picture of it for us? Looks like a 1G, but I'd like to see it anyway.
Thanks

On the same theme as testing the a/c you could disconnect the alternator and see if the squeal goes away.
Would be a quick test, and maybe you did that already as you sound pretty certain it's the compressor. And since it was not aligned properly before, it's a good bet to be the problem. Just hate to see you looking at one thing when it might be another.
I guess this is why that particular compressor has dual grooves too. Smaller diameter pulley and perhaps it's got a higher load on the pulley than the old York style as well. I don't know what the internal properties are of the different models, but it might be worth testing.

Oh, and for some reason I can't think of the common name for that type of adjuster you were asking about with the picture above. I like that design, as it lets you put as much tension as is advisable without resorting to special tools and lots of grunting and groaning.
I'm sure someone will have the name off the top of their heads. It's a modern version of a common design. TURNBUCKLE!!!! That's the name I was trying to think of!
So whether it's still an actual turnbuckle or not, that's what I'd call it.

Paul

 

Those look like heim joints on the ends of that adjuster.

Might try some different belts or some belt dressing.

 

It's the AC, it only does it when it is on. If I keep it off there is no sound. At idle there is no sound, only under load/acceleration with the AC on. Then it is constant.

Everything is much better aligned, but it made no difference as far as the squeal goes. I've tried various belts, widths, routing, 2 on with one around PS, 1 only on compressor, 1 around AC and PS, it never makes any difference.

The only thing that has made is a difference is that first take off or two after I've just tightened everything back down. It goes back to squealing thereafter. That's what has me thinking it is pulling itself loose and I may need to find another way to secure it in place.