Get the DELPHI fuel return line kit from NAPA. Keep in mind that there are two different kits, one kit has four 90 deg return caps and the other has two. So take a quick look at the injectors on the front and rear corners to see if they have the 90 deg caps.
Steve
86 Bronco, XLT, 5.0 EFI, EEC IV, AOD, IFS, limited slip front and rear, 3.08 gears, Tilt steering, factory AC