quite sure that info has been covered in the dana 60 bible thread in the forum already. sirch newb
edit its like 6 down '05+ Ford Super Duty Dana 60 Axle Tech & Info last page has measurements on all three knuckle types.
I can climb under my rig later with a tape, but my measurements will probably be marginal as well. are you looking for the inside to inside measurement? out of curiosity, what are you trying to accomplish?
wow. ok. I have that exact problem currently. got my diff from the wreckers. my driver side castor bushing has always sat "high" . I've tried to re seat it multiple times to no avail. and I've done balljoints twice now with no change to that side. the pass side sits nice and flush like all others I've seen. I've even bought a new castor bushing from ford to see if I had a bad one. nope...