Hmmmm yeah that is interesting, when I talked to JB last year she said she only recommended the front output shaft if you had big tires (I think she said 44 and bigger) and big horsepower, so I was just going to order the rear shaft and the reason I hadn't already was because it was supposed to be a Christmas present but they had the 4:1's in stock but no rear output shafts.
Now she also didn't say anything about the effect of copious amounts of alcohol, you might want to phone and ask what there policy dictates on that :flipoff: