Yep, the 4571 is the smaller diameter cylinders on the smaller vehicles. But if I recall the 60cwt uses the large dia cylinders all around. But to that end I just checked tha manual and you may be right Grant...1-3/8 shown for the Fords as well on the fronts.
A call to the supplier of the chev master cylinders may answer the question about the diameter. I think I see the word "argentina" in the casting....not a usual supplier of brake parts. It would be interesting to find out if the smaller diameter master cylinder would work for the 15cwts, or even for the HUPs. I will have to cross that bridge eventually when I get to my HUP.
Last edited by rob love; 29-06-14 at 00:46.
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