Big Bang Theory, Why is the nose of my Diff pointing straight down...

I was doing some research the other day for a circle track car I play with on occasion. Many of the cars in that class are running 9" floaters. This car still has a GM 10 bolt in it. One of the recomendations i saw was to weld completely the center section to the axle tubes. Would be cheap insurance for an 8 1/4 running a little more pop than Chrysler saw fit to give us.