I fussed with the adjustment a little more this AM and have it so I can reliably shift into each position. Although the bushings are mostly intact, they are probably imparting more play than would otherwise be there. So it's not perfect, but good enough for me to control it. I went for a slightly longer spin and I can get it to shift into all 4 speeds so they are all there. The kick down to 1st, and start in 1st when in the "2" position all works. The upshifts are roughly at the right speeds, though I haven't done a precise check. It's perhaps a bit slow to down sift, but for now I think makes for a sufficiently drivable car to go work out other problems.
It was a while ago, but I previously went through the 3 position solenoid set up, not just checking for rod movement, but actually measuring the pressures in each position to be sure they were correct. The pressures were 10 @ idle, 40 psi in the middle position (off idle, but no kickdown), and 60 psi in kickdown. I think those are all good pressures. So I'm pretty sure the basic gear box is good. I also checked the modulator vacuum line up at the manifold to see if it was wet with ATF, but it's not. Dry as a bone. That doesn't necessarily mean the modulator is working correctly, but at least it's not leaking ATF through to the engine.
At this point I think I can drive it enough to get the mixture back where it's supposed to be using my AFR meter. Then I'll start driving the car progressively harder to see what I can break. I already surfaced a cracked cooling hose early today. More to come, I'm sure.
