Slow, Driving Rustoration 1972 Dart
I believe PST has the C body pitman and idler arms. I think that is where i got them from. Problem you will run into with a stock 67-72 A body steering box is the splines are smaller than a B, E, C body box, and the C body arms wont work with it. The A body power steering boxes went to the larger B, E, C spline in 1973. An F, M, J steering box is also larger spline and a direct bolt in as well.
There is also an old discontinued moog problem solver kit for the idler arm. It replaces all the guts on the pivot end that bolts in to the K frame. It has thrust washers, and ball bearing races. The bolt it comes with is drilled hollow and contains a grease zerk. I have 2 of these kits one for each of my cars. Takes all the slop out of that side of the idler arm.
I might be interested in that saginaw pump kit you have depending on what you want for it. PM me about it