on the rear diff there are front and rear mounting points for the track arms rod ends to screw to. im using the rear side of the diff on mine, due to the tuned pipe size in front, but have had to make a 3rd (flimsyish) hole for the suspension to work right.

heres a pic of the back of mine, and i marked where i think that is on ur pic so far. it would be an idea to do this on both the front and back of the rear diff casing, purely for my own selfish reasons!

maybe make up the 2 bosses into one larger one with 3 holes in?


ps - i know its leaning a bit - i hadnt yet set the preload when i took the pics.