It's half way out
Ok, the engineers at Frigidaire weren't that good with their installation method.
I removed a couple screws that were holding the machine to the counter.
I then removed the lower cover and found the water valve. The clearance is too tight for a normal sized wrench to get in there. I took the valve off of the frame. My thought was that I could pull the DW out and then remove the valve ve.
At this point nothing will dubge at all, so I started to remove the counter. I got that off, but it still wouldn't move. I then removed the cabinet to one side. The building in block and everything is toggle bolted. I did get the 12" cabinet removed. Once that was out, I found the problem. The frame of the diswasher is anchored to the floor about 3" from the rear wall! I assume it's anchored on the other side. Though the screw head is good, the anchor is frozen by age and rust. I tried to remove the sink base on the opposite side, but the screws were rusted there also.
So, back to my comment about poor engineering. Why would you ever wish to fasten a DW to the floor in the rear? I'll be going back with a cordless drill and a tubing cutter. In peeking in the back, I see that the water line goes up from the floor through the frame. Once the DW is loose of the anchors at the bottom, it will have to be lifted off the supply pipe.
I will overcome the obstacles, but this is why all the old DW's get trashed. I am lucky the building is being demolished in this case.