I bought a " New " SF-63 cam from a guy in the 80s it was also stamped C4AW-B and had another number and corporate logo stamped in it as well , the cam was supposeed to be a " Racer Brown " cheater cam with the C4AW-B lift and duration . I could never find a racer brown catalog to verify what it was but I did find a pic of a racer brown SBC cam and it did have the same Racer Brown corporate symbol stamped in it
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