I had to give up on the Mugen Diffs I was unable to overcome the short drive cups. So I ordered up another set of Ofna Hyper 7 diffs and installed a HB #109840 4.3:1 ring and pinion in the rear hybrid got it all shimmed up and it feels like butter. Unfortunately my front ring and pinion wont be in till Monday.
I buttoned up the rear end, she is loc-tited and ready for battle.