After looking at the picture, it appears that the pump could use either side as the high pressure one, as long as one knew which way the "O" ring pointed. Is it possible the "reversed spool valve" was the design intention of the manufacturer? Could we (builders) or Lancair just be putting the pressure valves in the wrong ports? If I had your picture prior to putting the hydraulic system together I think I would have opened the pump up, ascertained which way the spool valve pointed and put the pressure switches in accordingly.

Mark,

 

Not quite as simple as that.  Each pump port has an internal "relief" valve that is to be generally set to about 400 psi above what you want the port to deliver.  If the hydraulic connections would be reversed, the down side would have a very high pressure safety relief valve and the up side wouldn't reach the required value of the pressure switch.