Here in Australia we run 17.5 4wd so we require lower-tooth spur gears (usually 75/72/69). Would anyone know if AE are making these sizes to fit directly to the center diff in the b64d? If so , would they be included in the kit ? Those running b44.3 had to chop=out the center of a lower-tooth spur gear in order to make them fit. Coming from a b44.2 i'm a bit worried that i'll be stuck with a center diff I can't fit a spur gear onto that I need .