Like he said, it "might" fit, but probably not.
We sell a hose special made for that (
http://www.wildhorses4x4.com/product/Pressure_Hose_Stock_Box_to_Delphi_Saginaw_Pump), but I don't know if it's something we make, something we have made, or something we found from some other application.
The threaded hole for "most" of the Saginaw/Delphi pumps (at least the ones we sell) is 5/8x18 inverted flare. Pretty basic stuff there.
If you're in to making your own stuff, the adapter for the pump to -6 AN is going to be something like this:
http://www.wildhorses4x4.com/product/Fitting_6x5-8-18_Inverted_Flare and you can simply add whatever fittings and hose type you like to work with.
The box unfortunately has as many possibilities as Broncos (typical hair pulling stuff) but most I've seen are either 14mm or 18mm fittings.
Not sure which end the hose I mentioned above has, but it would fit most of the newer crop of 4-bolt Delphi boxes I would think. Depending on where they were sourced presumably.
Did you buy the stuff as a kit from one of the vendors, or did you put it together yourself? Did you buy it recently, or in the past few years?
Good luck.
Paul