AC compressor is not rotating to loosen and remove the belt.

- I have loosened the tensioner lock nut and it turns freely.
- I have backed out the tensioner so that it is 1" off the of the compressor bracket that pulls the belt tight.
- I have loosened both of the bottom hinge bolts.
-- I can see the compressor mounting frame slide up and down at the hinge points when I press the compressor.
- I have used a bar and tried to pry on the compressor using the side wall for leverage.
-- The front of of the compressor appears to rotate but the back is firmly in place.
- I put a block on the bottom of the mounting frame and rapped it with a hammer but other than seeing the hinges slide up and down there is no rotation.
-- The belt is no longer "tight" but it certainly is not loose enough to remove.

It sure feels like something is still locking the compressor into position.

On YouTube I saw a video that mentions a bolt at the top drivers side that also hold the compressor. As far as I can tell on my '88 244 that bolt is a compressor mounting frame bolt that is not connected to anything but the compressor.

Any ideas on what is holding the back end?

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1988 244 DL; B230F; LH-2.2; Manual 5-speed (M47)