At 580,000 km's on my 3500 work truck, I've done my fair share of U joints. I didn't get good life out of SKF's or Napa's in that truck. I've gotten the most service life out of Dana/Spicer/Mopar U joints. It's all I will buy now for my 3500 and my SRT-10 ram.

Watch this guy's entire series on U-joints, I learned that there is way more to installation than I learned from Chiltons manuals over the years.
I started saving snap rings so when I change a Ujoint, I can do the dial indicator test to get the run out to a minimum, it really makes a big difference in the drivelines smoothness and U joint life.