all you would have to do is flip flop the lines at steel lines at tranny. wouldnt take 20 minutes;)
At pressure I'm sure its not a big deal. Its probably meant to keep air out of system.
actually I wondered that myself. Heres quote from B&M------
Mount the B&M SuperCooler with the fittings on
top or on the sides. It is not recommended to
mount the cooler with the fittings pointing down as
this may create an air pocket in the cooler resulting
in reduced cooling efficiency. When...