C15 rear bumper brackets
 

My 67 C15 came with a roll pan, and I'm a little over the look of it and want to put a painted bumper on instead. Not a huge fan of getting rear ended with no bumper to take some of the hit.

Looking on LMC and other places, the brackets are all listed as rear coil spring suspension only. Is there a massive difference in the brackets between the c10 and c15? I haven't seen a C15 bracket, but cant see there being a massive difference.