you need to call the company that is making the axles for you. many times they have a different measuring technique than other companies. similar situation with driveshafts.
check out a website if they have one, and it is usually described in a FAQ area.
they are stock.i have rear disk and the 99 and up axles or to long i have one that is out of a 94-98 i think and its a but hair shorter than what i pulled out of my car.but when you measure it in one place its different and if i take a different measurement they are the same.wtf