I'm very glad to have another, more experienced, brain working on this with me.
Yes, it is going back SUA. Making steering linkage would be no problem at all for me. The tie rod from the Cherokee is a "Y" setup, with the drag link in it. I could use that, or make something out of the Dodge tie rod, which is a plain rod, but very nice and beefy. Or build something from scratch.
The main objection to either of those is that I think a straight tie rod on the D44 knuckels will clang on the pitman arm when the steering is centered. There was only about an inch of clearance before, and the D44 arms look like they're about an inch longer than the D30. If I don't have a clearance problem I may well change plans.
On the other hand, at full lock the tie rod on the D30 is only about 3/4" from the front of the D30 diff cover, so that could interfere with the larger D44 cover.
I'd like to use D44 everything, but if I only use the D30 knuckle I would think that wouldn't be too bad. It can't be much weaker than the D44 part, and I think I could still use the D44 stub axel and internal-spline hubs. Not sure about that yet, though. That will depend on the ball joint to spindle mount face dimension. I haven't yet measured the knuckles for that.
I might have been born at night, but it wasn't LAST night.