Ive got them re-assembled. That was a fun weekend in the gravel driveway. Big truck stuff is heavy.
Here is what I ended up doing....
Take these two pieces out of the stock pack. The anti wrap leak and the spacer block.
Buy new center pins, cut them down because you can only get 3/4x3/4 heads locally. Ford used 3/4x3/8 ish
Jack up truck from the frame. Remind yourself to use a bottle jack next time..... Floor jacks don't roll on gravel. The license plate panel is not so pretty anymore.... Truck fell off jack.
Plan was to undo U bolts, roll axle forward, drop center pin out, reassemble with extra parts. Well remember this truck has an LSD? Yeah can roll one side forward.... So get out plywood, and a second floor jack, add some ratchet straps, and you can barely move the axle enough (after disconnecting sway bar).
OK, center pin out, WTF why does new one not fit?! Oh Atlas used a smaller one... WHY?! Head would flop in the centering hole in the axle.... Anyway. Now I have to drill out the entire spring pack to the larger center pin..... That was fun and my drill hates me.
Pack with extra bits together.
Now the Ubolts are too short again. Did I mention I just got new ones for this pack?? (at $15 each...) No more pictures, but new Ubolts got made. bolts were tightened, not need to find a torque wrench that goes too 300 ft lbs... They are about as tight as my electric rattle gun will go. Which I had to drive on block and dig a hole under each spring pack to use.... anyway. Frustrated by this ordeal, but truck is derivable now, and ~3/4" higher than it was with the stock springs and airbags, with no air in the bags. I have not even test driven it I was so tired and pissed off. Need to beat the license plate panel out still too.