So it looks like the ones in the link are right. I heard moog wasn't bad, its just the grease boot? Is that correct?
No, I've had several Moog joints (the joint itself) fail too.
I had put all Moog joints in mine when I did the original build on my BII. One developed play after just 5K miles, the other one was sloppy after maybe 8K. Thinking it was a fluke because I did have a grease boot also fail, I bought another Moog joint to replace the one that failed at 5K (this before I found the other one loose at 8K). That additional joint also started getting sloppy around 10K (removing doubt maybe my first two simply came from a bad batch).
Meanwhile the Spicers I've had in my Ranger since around '03 are still good & solid at ~80K, and the Raybestos joints I replaced the Moogs with on my BII are also all still tight at roughly 25K.
Another observation:
When greasing the Moog joints, the grease always came out from around the joint a very opaque dark gray-metallic color...
With the Spicer/Raybestos joints, the grease always comes out the same color it went in, maybe just having a slight brownish tinge to it.
Obviously the grease coming out of the Moog joints was full of metal shavings from the joints wearing themselves away internally.
I won't touch a Moog joint for a Dana axle again.
FWIW, the Moog joints I had were labeled "The Problem Solver", they came in a yellow & blue box and were "supposedly" the best ones Carquest sold at the time. They were not cheap (within a few $$$ of what Spicer Pro-Grade ones would've sold for).