you also have a doubler then additional reduction in the crawl box. even though the trans does have a crap ratio (3.8 i believe). so wouldn't you technically be in triple low compared to stock? you also pay entirely too much for all your parts
on the issue with the auto, im under the impression the the TC doubles the the ratio as cox said. I may be wrong, but isnt an auto less harsh on the drive train and absorbs some of the shock load?
and you have an argument like this for manuals:
http://www.youtube.com/watch?v=g4ygskAqoO0