New Pitman Arm Help Please

340fourspeedDuster said
I just was bit by this on my Duster. Have a power steering gear box that was leaking like crazy. Replaced it with another fresh box that I had on the shelf for years. It seems that the new fresh box has the lager diameter splined shaft. So my Pitman arm will not slide onto the splined shaft. Did not know that there were two different shafts on the power steering boxes. Now, can I just purchase a new larger hole Pitman arm? This vehicles has headers and a 340. Will the new larger hole arm be the same length and curved drop and shaft to fit the rest of the steering linkage? Anyone by chance know a part # for this Pitman arm? Crazy. I thought maybe this was for a B or C body car. Any help would be appreciated.

The problem you may encounter depends on the year of your Duster 72 and older PS boxes used a smaller pitman shaft and the stud that connects to your drag link faces up. On 73 And later they used the larger sector shaft and the stud at the end faces down. So unless you change drag links to the later model, your not going to be able to hook up your drag link.