If you plan on making enough HP to need the back brace on any rear end with stock cast iron caps please replace the stock drivers side cap with a billet steel cap and better fasteners up twocents
I bent the crap out of my original 8 3/4 housing wuith no back brace with steel caps and 35 spline axles and spools with ladder bars in my old pump gas street Duster whiney shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)