I just did a Pittman Arm on a one ton 4WD. I had to remove the steering gear as the major lower frame is right in the way. I used a cut off wheel to make reference marks on the old arm and casting so I could reference the new arm.

The steering shaft telescopes and I needed assistance in re-assembly.

It took about 2 hours to do the whole job. I have the luxury of a lift and a full compliment of air tools. I would guess it would take at least 4 hours without those tools.

The hydraulic lines have 18mm flare nuts and you may want to loosen them with a crow foot wrench as getting a good purchase with a flare wrench is difficult, I used the flare wrench after I broke the seal as it is faster than the crow foot.

A pickle fork air hammer was used to break the Pittman ball joint and a Pittman puller was used to pull the arm off the gear case after it was removed from the truck. I used anti-seize on the shaft just in case.