anyone seen this done or heard about it? just a random "sittin on the porch drinkin beer lookin at the truck" moment. im one of the probable few that loves my 6.2L, but id LOVE to ditch the three speed TH400 in favor of an allison 5 or 6 speed. overkill i know, but meh. Also does anyone know what t-case comes factory behind those trannies? im sure if i spend a little time online i can find out, but figured id ask and save some time in case someone already knew. this is more of a cuiriosity question rather than a "im planning on doing this" question.