I know it's been a while, but I've been doing some shopping for brake parts. Should I assume that I have a 1-1/4" MC? Is there an easy way to check?

I think I'm leaning toward swapping a dual circuit MC from some other application. It would be cheaper, easier to source parts for, etc. I'll have to either add 10 psi residual valves, or try to find a drum/drum application. I contacted the Dorman "tech support" asking if they had some sort of parametric search, and they were less than helpful.

Does anyone know a good site that would let you browse MCs and show you their strokes and bores?