valvetrain the mr gasket brand provides a variety ... and driveline components oil restrictor valves reduce oil flow to rocker arm ... areas with a pair of oil diverter valves these valves fit small and big block ... chevy engines with screw-in style oil lifter ... retarding the cam application part no chevy sb 283-400 long style stock replacement ... crankshaft key 983g chevy sb 283-400 short style stock replacement ... crankshaft key 984g chevy sb 283-400 bb 396-454 short style silver 2 ... ° offset crankshaft key 987g chevy sb 283-400 bb 396-454 short style copper 4 ... oil off you and exhaust while making valve adjustments with engine running for ... stock rockers only 8/set part no 1015 chevy ford pontiac advance retard cam ... dowel pin hole must be drilled for chevy 283-454 and all chrysler b block ...