Got it done and everything works good. Replaced all the seals I could get to (although none appeared to be leaking) and the driver side cv axle, I accidentally let the bearings out of the old one when unhooking it (oops) and noticed how worn it was, and a reman was pretty cheap.
Oh, and I think the spec is supposed to be 21.1mm for the flywheel step. I told the machinist 23.1, but he said that wouldn't take much at all off the step, so we went with 21.1mm and it is fine so far, the clutch releases like it should so it much not be too small of a step. If you look it up online you can find some vague references that mention 21.1mm for rabbits, but they're not specific to diesels.
This is the first time I've driven a vehicle with a new clutch, the grabbing power is amazing. And no more clinking of loose clutch springs.