Needs intake, headers, 2500+ stall converter and gears. Basic Operating RPM Range: 2,200-5,800 Intake Duration at 050 inch Lift: 230 Exhaust Duration at 050 inch Lift: 236 Duration at 050 inch Lift: 230 int.
Advertised Intake Duration: 282 Advertised Exhaust Duration: 288 Advertised Duration: 282 int. Intake Valve Lift with Factory Rocker Arm Ratio: 0.510 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.520 in. Valve Lift with Factory Rocker Arm Ratio: 0.510 int. Notes: Retro-fit: Designed for early non-roller blocks.