The shock mount "appears" to be triangulated from the center cross bar to somewhere lower on the frame. You can kinda see it in the first pic, another bar located below and in between the top 2.
If all of the suspension bolts to the rail, that's not gonna be fun to fix, maybe notch the rail then add to the lower/outer side to bring back the structure.
I'm no frame tech or big block tech, but I'm in the Orlando area and willing to stop by to do some brain storming...
