A steel unibody may bend in a moderate collision, but it can often be straigtened by a competent body shop. Castings are more brittle, they tend to crack, not b

A steel unibody may bend in a moderate collision, but it can often be straigtened by a competent body shop. Castings are more brittle, they tend to crack, not bend. And they can't really be welded back together. I think having major parts of the frame as cast pieces will reduce repairability, but time will tell.