what is the difference between the backing plate for the single piston rear calipers and the dual piston? Is there even a difference?

Reason for asking is my backing plates have nothing left to them. I see aftermarket company makes a 2 piece backing plate that clips together (so I wouldnt have to pull the axles to put it in), however it is advertised to fit the 2 piston rear caliper trucks.

My truck is single piston rear.

 

I'm not sure if there is a difference, but I'm pretty sure that guys have upgraded from the single to dual piston calipers without changing the backing plates...so I'm going to bet that they'd work for you...

 

thanks bud. I guess I'll give them a try.