Inspection was never an issue for me, since OK doesn't seem to care about the vast amounts of unsafe, uninsured drivers on the road, but wanted maintain ABS and not cutting dash lights.
( reason I refuse part time on 80, too. ).
I spoke, in depth, with Currie about machining the wheel speed sensor ports into a built housing, using all 80 outers since a similar method of reading, and they claimed the it was cost prohibitive considering the lack of available market (keep in mind, a built front was nearing $6k from Currie, already).
For a total of $11k worth of axles alone, I didn't feel it was "worth it" (hahahahaha) if literally cutting lights, at least not for the caliber of build I had in mind.
After determining it wasn't a good investment on mine (hahahaha), started looking for 4x2s with high mileage, on the cheap, to transplant the axles out of my 04 F350 ( then with a rod through the side of the POS 6.0L block. Now running again) because the WMS-WMS is 63", DS drop, run an clocked, tucked Atlas, 3 link rear, radius arm (at the time, it seemed a good idea) front, coil overs at the corners.
I had found cheap 07 4x2 at auction and almost bought, but that's when the tides changed and bought an 80.
As I gain fab skills (hahahaha) I still may build exactly that, someday, as a trailer queen wheeler.
When I started considering the SAC, I really wanted to build the FJC how I thought it should've been built when introduced (I can recall being so friggin disappointed when they unveiled) but have to be a whole lot smarter than I am to do it right, being "if" Toyota would've done it that way.
On top of that, all have been, or are, for sale, except MissFJ, who disappeared from the forum years ago.
(At a loss for words.....still)
I'm almost done with the 80, and had intended on refocusing on FJC, doing bushing replacement, general PM (at 107k, now) and driving until one of my kids is old enough, leaving the 80 for wheeling duties.......but then Sol bumped his thread with updates and the SA itch has returned, NOT because I think it'd be the best wheeler ever, but more a necessary diversion to the reality that is my life.
Sorry for dissertation, OP. Follow link previously posted, or pick up on the latest updates from Sol
here.