One of the key decisions in any engine build is the camshaft selection. We decided to go with a hydraulic roller, the No. 35-424-8 from Competition Cams. A hydraulic roller offers reliability and low maintenance, and a performance increase over a comparable flat-tappet hydraulic. The cam specs out with 224/230 duration at 0.050-inch tappet rise, and 0.513/0.513-inch lift, enough for some bite up top, while preserving driveability and torque.