1967 Dart stiff steering after replacing Idler Arm

OOps
But the on center chasing part, still applies
But end play does not, there should be just enough sector-shaft end-play, to allow the on-center tightness to be zero. Again if there is tightness, you will be constantly correcting, chasing the car from one side of the lane to the other, because the self-centering feature is defeated; the car goes only where you point it.A little loose is better than a little too tight.

The shaft going in as the extension from the steering shaft should have zero play in any direction.I loaned my FSM out so I can't verify, but from memory, that box has tapered bearings on that upper input shaft, so a little preload on this one is/would be permissible.