i think the spindles are different between the 2wd and 4wd.

i am not sure the axles are the same width in the postal jeeps so you would want to check the width before shelling out the dough.

good luck

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

years ago I put a 392 into a model MB jeep (that says how many years ago), anything can be done

some suggestions:
relocate the rad and condenser as far forward as possible, cut the sheetmetal and fab new supports
then cut out (with a saber saw) the offending section of the firewall and weld in a spacer as required

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Bill

'82 300SD 195K
'84 300SD 199K