I put there OTK on rubi dana 44 TJ. Bolted up fine.
Had to cut off the OEM front sway bar mounts and trim spring buckets a touch. (Due to OTK, not needed for under the knuckle)
All that was pointed out on there web site if you look at install PDF.
There was no surprises
Make sure you get a decent reamer for the 1 ton tappered joints, I got a Snap on. In the diameter needed there is not alot cheap ones out there, it was 50-60 bucks IIRC.
"CHEAP HEAP" TJ, 4.0, 32rh, 231, built D44's, 37s etc.
"George 4man" CJ7, 304, 727, D300, C/O rear w/ stretch, built D44's (4 now) on pane :).