Thanks guys. Update:
Tightened the pittman arm about a half turn this am. It started out firm but there's some real torque on it now—maybe 50-60 pounds. The steering wheel moves barely at all now before the works start working. So that was that.
I turned the plunger thing between the master cylinder and the pedal about two and a half revolutions, which took up about an inch of slack in the brake pedal. There is now about 1/2-3/4 of an inch of free play, and I have pedal. Not as high a pedal as I would like, but an apparently firm pedal, the depression of which causes the calipers to close on the rotors. So that's that. I will tighten that up with like one more turn of the screw (to get the free play down around 1/4 inch), add a lock nut and done.
—Except I'm missing one of the anti-squeak clips. I know I have it somewhere; it came off when I put the car on Cory's trailer to get it to the paint shop, and I remember putting it in a box with a few other odds and ends. But which box? Where box?
Meanwhile: Rear left axle seal appears to be leaking. dang. So will scare up a couple axle seal kits and get in there again week after next.
Ordered exhaust flanges to complete the Sebring muffler setup.
Rest of today will be on wires: finish the horn setup, get the headlights and dimmer switch squared away, and then the remaining engine/gauge wires.