The diff unit would fit with no problems at all but dressed up with all the braking might be a different story. Worst case would be to just use the diff and retain the sierra outboard brakes. Those discs are 10" in diameter so its not as big in the flesh as picture would lead you to believe . I just like the idea of all those bits being inboard, makes hanbrake cable ,brake pipes all a lot easier, less unsprung weight less strain on all the wishbones under braking ,lsd and loads of different ratios. If it cant be it cant be but would like to have a go.
http://www.vxopel.com/pic/cobra/ra2.JPG
Bob