Actually, the master cyl. that I purchased, was part of a kit to convert a 1/2 ton to front disk. I never used it, and am working on a different truck now......a C30, with all four drums. Therefore the master should still work, but it may have one chamber designated for the front, and one for the rear? It had a proportioning valve attached to it, which I removed, as I was told I didn't need it for four drums. It would make sense that the closest to the booster would be the first to get pressure as the pedal goes down, so that should go to the front correct???
ok, with that explanation, yes, the large port closest to the booster will be for the front.
leonard
