This turned out to be a bit of a pain in the butt to figure out, as the D.D. kit has a bump out that blocks direct access to the linkage. This is becomes even more of an issue if you clock your case up as I have.
For the Arm on the case, I wound up using part of the clutch linkage off an older F series pickup, and slapped it on the case. It turns out that the splined hole on the arm fits the T case side perfectly. If it winds up giving me trouble, I’ll come up with something else:
It’s nice to be able to slap a lever around as opposed to messing with the push button (I like my instant gratification). If you could get a 2 low setup similar to what available with the 231’s (or 205/D300’s) I’d be a very happy camper. I still need to come up with a boot or something to cover the hole in the floor, but it’ll work for now.