Running a 5.9L based stroker 408 ci in 74' Duster. Engine has 4" mopar cast crank, K-1 rods, internal balance. CP pistons, 10.5 cr, RHS magnum style iron heads mild port and intake matching, Hughes hydraulic roller lifter cam 236/242 -.559 lift, racer brown roller rockers. Eddy RPM airgap...