T-2 Torsen plans?

I am going to the FSAE formula competition with my school. They love it when we make stuff. I'd like to construct the T-2 torsen down to our scale (500 lb car). I've been searching the net for pictures but have not been all that successful. From what I've seen there are only two inside splined helical gears and 4 sets of two helical equivex element gears. But I'm not sure what holds these in place. Any pics, specs, plans, prints, suggestions would be awesome.

Thanks guys

Joel