M-6250-C460. for 429/460 Wedge. Hydraulic Flat Tappet. Has excellent torque & horsepower. Same as used in a 460 Crate motor. Peak RPM Torque 4750 BHP 6000. Duration (2nd Duration figures are at .050" lobe lift) INT. 310 Degrees & 244 Degrees, EXH. 320 degrees & 251 degrees, Valve Lift INT. .588" EXH..614" NOTE: specs & photos can vary