I got my kit from novak-adapt.com. They also sell the twin stick setup you spoke of. $240.00 ish for the master kit and $120.00 ish for the twin stick. the kit doesn't come with the shift rods but it has some little sleeves that slide over the ends with a bolt through the holes to secure. They have good pictures for you to look at and lots of great information too.
I'm just curious, what transmission was your Dana 20 bolted up to? Could you post a good picture of the complete mounting surface on the Dana 20 that attaches to the transmission? Thanks 71cj!