I believe it was either a D60, D80, or a Ford/Sterling 10.25" (I'd have to check notes to narrow it down...)
As I recall, the XJ WMS-WMS axle width is 60-1/4", while the F-350 is somewhere around 65-70" (again, I'd have to check to see what I've got. Haven't been able to talk to Ford directly yet...) so you'd probably have to change backspacing so it wouldn't look too ridiculous.
N.B. - Aren't the 1-ton pickup axles 8-lug patterns? What do you plan to do to match front and rear lugs? I think the F/S Ford front axles drop on the wrong side, so that could be difficult...