Working on the AC today with moderate success. Yes, the main unit is secured under the dash, but currently only using 2 brackets. Very tight under there, but I think I can get a couple more in now that it is secured in location. In order for the disc on the back side of the #6 line to clear the foot well, I needed to move the unit forward about 1/2" which also means the front of the unit is sitting on the 2X2 aluminum tube that supports the dash rather than the flat aluminum plate. Will require a thicker gasket but that shouldn't be a problem either. If I could think in 3 dimensions, seems I could figure out where to put a removable panel on the footwell and be able to access all of the lines, but worried about that big of a cut in the monocoque. In the pictures below, there is not a lot of clearance for the #10 line either, but going to order a 45degree fitting and I think it will clear, allowing all of the lines to run out the front of the footbox. I have a bulkhead fitting to clean up that area.
The good thing about today is I accomplished what I set out to do, and finished up in time for lunch. Hoping to get some more parts next week and get back at it soon.