I'm narrowing a '60 Olds rear end for my '28 high boy. The Olds rear end came to me with no brake shoes or hardware, no drums, just backing plates. I have what appears to be a complete rear brake set up from '57-58 Pontiac (left over from when I put Wilwood discs on the rear of my Willys PU). The Pontiac backing plates are more compact and a little prettier than the Olds version. Olds housings have a full round flange while the Pontiac backing plates require a flat across the top. The axle offset (housing surface to drum mounting surface) seems to be compatible. Anyone see any reason why I can't just grind the proper flat across the top of the housing ends and bolt 'em up?