I have master cylinder casting number 5460346 with the () marking on the passenger side and no bledder screws. The casting has pads for the bleeders but they are not drilled. On the other side is cast 271 D1 and the front brake line machined area has GM 300 stamped in very small letters / numerals. What year(s) does this fit. The bore would ID it as a PB master cylinder 1 1/8". Thanks
Bill
Bill
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