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Starting in 1987, Chevy converted to hydraulic roller camshafts. We   chose a Crane CompuCam roller with 0.407/0.429-inch lift to make more power that is also emissions-legal to keep the smog police at arm’s length.
My Generation Camaro, Part V - Rebuilding 1987 Chevy Camaro Ported Heads & Cam

Starting in 1987, Chevy converted to hydraulic roller camshafts. We chose a Crane CompuCam roller with 0.407/0.429-inch lift to make more power that is also emissions-legal to keep the smog police at arm’s length.  View Related Article