CL77 short brake arms

[gopher]

I'm re-assembling the front and rear brakes on my late model CL77. When I sent them out for chrome I had them well marked. Of course they all came back in a big box. I realize now that I mounted the long arms on the wrong brake panels. I'm not sure if I have the short arms on the correct wheels. Honda lists two different part numbers for these short arms. I can't tell them apart. One arm measures 61mm long and the other about 61.75mm long. Otherwise they look the same. Does anyone know how to tell them apart and which one is for which wheel?