Some things to think about.
1. Toe in will make the car roll straight.
2. Having said that, there is a kit on the market to brace the Dana.
It uses bars that bolt to a differential support cover and triangulate over to the axle tubes.
3. If you look at the construction of a banjo axle, it is basically a heavy sheet metal construction. The axle tubes are welded to this sheet metal construction. Because the front centre section is removable, the front cast iron structure is never attached to the axle tubes. So you have under high load, a very flexible construction.
Back bracing the housing helps with this to stiffen the housing structure.
Now if you look at a Salisbury type housing, the axle tubes are welded directly to the heavy nodular or grey iron centre section.
That centre section is a heavy thick walked casting. The draw back to this type construction is that they are heavier. Many people will shun the Dana because it is typically 15-20 pounds heavier than an equally build 9 inch. But this extra meat, or weight and the type of construction are precisely what makes these type axles inherently stiffer and stronger. The Salisbury design also integrates the axle caps into the axle tube structure, which also stiffens the caps. Read that as better gear life.
