LBP vs SBP 8.75 Brake Backing Plates
Lay the backing plates flat on a table and measure from the table up to where the plate bolts to the axle flange. You'll need to hang the bump for the E-brake cable off the edge of the table to get them to lay flat.
Assuming they're all backing plates for 10" drums, if that measurement is 1.75" it's a 10x2.5" BBP drum backing plate. If it's not then it's a 10" SBP backing plate. I had that measurement somewhere too but I can't find it at the moment. At any rate if they're 10" rear drum backing plates there's only two options anyway.
Lay the backing plates flat on a table and measure from the table up to where the plate bolts to the axle flange. You'll need to hang the bump for the E-brake cable off the edge of the table to get them to lay flat.
Assuming they're all backing plates for 10" drums, if that measurement is 1.75" it's a 10x2.5" BBP drum backing plate. If it's not then it's a 10" SBP backing plate. I had that measurement somewhere too but I can't find it at the moment. At any rate if they're 10" rear drum backing plates there's only two options anyway.
