Us X-5 owners already addressed this:
http://www.one-ten-rcforums.com/4wdr...ic.php?id=1382
I might add that using Deans plugs in stead of plugs/tubes (Corally style) makes it a lot easier to make'em fit any car!
Question: Shaft-drive cars give a sideways torque effect, which isn't ideal. Why not use a bevelled spur & pinion gear and mount it longitudinally? And in addition make the gearboxes assymetrical like on the eight?