I don't know the answers as to when or why it's necessary to brace a rearend housing. But a couple yrs. ago when i had ART build me a Fab. 9" housing for my in process blown Anglia ( 43 1/2" axle flange to flange) when it got here it had bracing inside the housing, a bottom brace and a back brace, the 4 link brackets were also boxed. It also had a 1/4" front pumpkin mounting plate blanchard ground for flatness with 4340 bolts. I told them about 1300 HP.
Zip.
