well, the diff casing itself is the same size, kyoshos, jammin, and hypers all can interchange diffs...all of them are kyosho-sized.
the one thing though, the spur gear onthat crt diff will be to tall, so like you said, youll have to figure out a way to raise the center diff mount and youll also need a center diff top plate that will work.
but the actually lenth of the diff, outdrive to outdrive, and bearing to bearing is the same as your hyper, so it should work.

good luck

they have hyper truggy upgrades, so check out and see if they came out with center diff spacers and a new top plate..maybe they already have one!