Yep, the Duff kit comes with a bracket go in place of the original so you don't have to cut them down, but I had already cut mine when I was rrunning my custom arms.Seeing as the OE mounts are part of the crossmember, I guess my options are cut them down, or make a new one.
The plate idea is good.
But other than that, no more pics of JD/Cage arms please, those are bent arms, and he's talking about extending stock (straight) arms
No problem with c-bushing bind? I figured that with the longer arms your mounts would need to be inboarded like they do on the later model trucks.
I had no problem with my old brackets directly under the frame and the arms were 12" over stock. Wheeled the pee out of it for over a year like that.