1) search > "emaxx center diff" = , this is a VERY common question, though it helps to know if you mean a centerdiff driveunit, or just a center diff to go inside the tranny...
2) Since a centerdiff unit is NOTHING like the traditional transmission & motor mount, you have no option but to use either a homemade mount or Mike's centerdiff unit & mount ( when he gets around to making some more )..