I finally got around to finishing this fuel line project yesterday, so I figured I'd give a report on how I did mine.
I used a sender from an 86 BII, but mounted a 94 Explorer high-pressure pump on it. Fuel passes into the original 85 plastic fuel line (I noticed it's made from the same nylon tubing, so it should be able to handle the pressure). The other end of the line is connected to the filter, mounted on the frame rail just behind the t-case. Next comes a piece of 86 BII plastic line, cut to the proper length and with a large garter-spring disconnect from an 89 2.3L Ranger installed at the end. This connects to the braided line on the engine.
Now for the return line. First comes the small garter-spring disconnect from the 89 Ranger, connected to a piece of 86 BII plastic line. This goes to a point just behind the brake proportioning valve (still in its original 1985 location) and connects to a piece of metal line from a 91 Explorer. After a couple of feet a piece of standard fuel hose connects it to a piece of original metal line from the 85. Finally, the last piece of 86 BII plastic line carries the excess fuel back to the tank.
So my fuel system has parts from 85, 86, 89, 91, and 94 vehicles, much like the Johnny Cash Cadillac.
The cool thing is that I already had all the parts to begin with. But the best thing is that there were no leaks when I pressure tested the completed setup!
Thanks to you guys for your info and suggestions.