Yep, The D30 I bought recently has some good battle scars and it has the little skid plates on the brackets. I took these before pictures. You can see that one side was completely re-welded in place.
I have already straightened out the brackets. Next I will grid down and clean up the existing welds and re-weld as needed. I plan to weld washers on the outside of the brackets, fill in the existing holes on the inside, grind smooth and drill the mounting holes to the correct size. They are oval shaped and pretty worn out right now.