Hi all, I got the rear end of a 55-57 Apache truck with a dump bed. Grandpa cut the cab off long ago, and it served as a trailer for decades. A couple years ago, my dad rolled it over into a ditch, and it seems the old U bolts holding the axle to the springs didn't appreciate it.

I have been looking around online, but all the squared U bolts I find look a little... light for the job. Does anyone know where I can find some heavy duty bolts? New or used doesn't matter, as long as they are still sound. The axle is an 8 lug pattern full floating axle (dana perhaps)?