Have you checked into a simple hub swap? Axle tubes are all the same length, it's the hubs that make the difference. Check out the 14-bolt Bible at the Pirate offroad website, they have a ton of info on 'em.
Hey gents, so what you are basically summing up is the 14-bolt corporate rearend is the one that would work well in the OP's truck for a bit of fender clearance?
I saw @Android04 original post in this thread and thought "oh $h!t, are you fugging kidding me"......granted my ride does not have what his has, but this was one more thing that I would be concerned about now as I have NOT put on my outer dual's yet with her lowered.
@Android04 your truck is beautiful, I just love those rims you put on there. Good choice of color too!
@Big Chip I wonder if you could spell it differently, like dooshbag and get away with it?