My son ordered all new suspension, brake and steering parts in order to make the beat up old 73 C10 2WD shortbed he bought safe to drive. Everything he bought has worked pretty well so far, except for the lower ball joints.
We completely rebuilt the front end and steering, and when we went to torque down the lower ball joints, we could not get the castle nuts to get anywhere near where they needed to be to install the cotter pins.
We did a search on the internet to see if we could find anyone else with the problem, and this is what the only post we found in the topic:
http://67-72chevytrucks.com/vboard/showthread.php?t=572037It turns out that we had the same problem. After it didn't work, we bought a set of Moog lower ball joints from O'Reily's, part number K6117T.
Here's a photo that compares the too short unit with the Moog unit that works (Moog is on the right) :