Drum brake size change

I just measured the old shoes that came with the 8 3/4 rear end, and they are the 10x1.75 shoes and I have those backing plates...darn, that means I ordered all the wrong stuff from Cass, Dr. Diff...
Thanks for the info folks. I'm just going to use my drums and shoes from my 7 1/4 setup since they are in great shape.