I dont know- do a mock up and see how things fit together.. or not, as the case may be- you may be able to use one or both shafts, in which case you may also be able to find a suitable dogbone if one doesnt fit ( I'd look at other people's maxxes using the center diff unit and see what they did ).
If you use 2 of these:
http://www.rc-monster.com/proddetail...d=RCMdiffshaft
then you can use the long plastic driveshafts, just trim the lengths to fit correctly.