wilwood and other companies say that 1 & 1/8" bore masters provide enough volume for our big wheel cylinders.
I'm not an engineer, but I'd have to question that statement...the small 1-1/8" MC might have enough volume to engage the shoes, but when done how close to the floor is the pedal? Our big trucks have 1-1/4" or 1-1/2" bore MC's for a reason and putting small truck brake parts on them is a recipe for disaster IMHO.
If 1-1/8" MC are OK for your 2-ton then why did GM put 1-3/4" Dual Pot MC's in there 1980's Topkick's ???
Be safe!
Mike B
