Hope this is a good place to post this. If not please place appropriately. :) I'm not affiliated with this company at all but man did they put out a great video explaining the types of differentials.
Purely a question, could you rake the bottom back so it would kind of match the angle to the engine cross memeber/ the angle the bumper has? Give you some more ground clearance? Not sure if it would be worth it or not. Even if not it still looks sweet. :)
Also I have an air dam from my Tahoe...