Here are the part numbers I bought for my '57 5700 Low Cab Forward 2 ton. Dorman boxed 24318T0 and 24319T0, those numbers are on the tag on the plastic bag. The Dorman number on the box for one of them isT090132PR. I have not put these on the truck yet as I'm planning on replacing the king pins, drag link, tie rod ends all a the same time this winter.
I hope doorman isnt the only brand, they arent known for the greatest quality. And since i work this truck hard i want to make sure i get the best quality brand i can possibly get. But i appreciate those p#'s ill look into them to see if they are the same as mine