There is also a 7/8” bore wheel cylinder that works with the 11” brakes.
It can be used to reduce the braking power a bit to balance things out if the 11” drums lock up too early.
Kind of similar to using an adjustable prop valve to balance the brakes out.Raybestos part number wc37236

I installed the 7/8 bore wheel cylnder with 11" drums on an 8 3/4 rear end that I built that went into a Scamp. The owner was happy with how it well worked.