A-body SBP 8 3/4 brake backing plates

I’ve only had a few drum/drum A bodies and all small bolt and all 1 3/4 rear brakes. I am in Canada so that may make a difference. I had a few disc cars also and all had 10x1 3/4 rear brakes. Never seen 2 1/2 rear brakes with small bolt pattern. Maybe u can post a few pics of the 68-72 A bodies u talk about @j061093409