Originally Posted by TDI Guy
Jason, I am running 3" sRYM springs up front and only have a single DC front shaft. You do not need a double. I get no vibs at all and I have a stock HD shaft in the rear. I can get you some angles sunday evening if you want. My truck drives and handles very well.
I spent 60 miles on the highway yesterday and I'm vibe free with my single DC. But, I got a great deal on a dual DC so my single DC will become a spare. Similar to your setup, the rear DS is custom but does not have a DC joint.
Don't go out of your way, but next time you're working on the truck please take some angles. It would be great to know what is working for you. Again, I'm in good shape and don't need to know the angles ASAP but it would be good info to have.