Aluminum drawers in a box, same height as wheel humps, drilled to bolt to factory seat and tie-down threaded holes. bolt tiedowns to the top. Allow for optional plywood deck to go all the way across. maybe a hi-lift mount on the side, it'll fit between the box and the fender.

Oh, how about a bracket that replaces the idler pulley on the 2.6 and fits up a York compressor and a belt tensioner? Or just a blank bracket with a centered shaft hole and base holes/slots to adjust alignment.

87 Dodge Raider 5sp 2.6l no jet valves, Tuffpan
OME Dakar leaf springs + T-bar crank + 2" body lift (4" lift).
5500lb winch, Starion alternator, grp31 marine bat'
OBA (stock AC compressor)
33x12.5x15 Baja Claws or Wintermark extra load 235/75/15 M/S