Maybe it would be cheaper for an atlas 4spd... A little heavier duty unit, I used a shop discound I think it cost me around 3k for my four speed. Not sure how that compares to duals from scratch but it seems like it would be comparable.
Cost isnt really the problem, I suppose....I can get cases for really really cheap and probably source a used adaptor......my lack of knowledge is my only concern at this point....but I think I'm in the right place to get all the help i need