There is but one way to put the pitman arm on, line up the scribed lines on the arm and the sector shaft (mine do line up, its the camera angle that makes them look a bot off):



This *is* the likely cause of your steering pull, if the box is not centered properly, it'll tend to pull towards its center position. Mine did this until I lined up the center lines.

And you can get the steering wheel centered by pulling it out at the firewall clamp and line it up there. I was able to get all my alignment done in the driveway:

Details on alignment proceedure.

The key was to get everything that matters lined up on its own, then hook the parts together. I lined up the front tires to the rear, setting the toe at the same time (by adjusting the tie rod), then centered the steering box and pitman arm and centered the steering wheel. Then adjust the drag link length to keep the front wheels lined up with the rear and insert the steering shaft to keep the steering wheel centered.