The COMP Cams CS 41/15 H6 hydraulic camshaft is a small‑block Chevy option (fits '58–'02 262–400ci) using a .420" lift rule. Expect a rough idle and low vacuum typical of aggressive hydraulic grinds. The listing notes roller lifter provisions on later '87+ blocks and advises that cams for 1955–57 engines with rear‑journal oiling grooves require special ordering.
COMP Cams Camshaft CS 41/15 H6