These COMP Cams High Energy Steel Pedestal Mount Rocker Arms designed for Big Block Ford 429-460 applications feature a 1.73 ratio. High Energy Rockers help eliminate the noise and slop associated with older worn and high mileage stock rocker arms. With a long slot for higher than stock lift camshafts, these rocker arms are an excellent replacement choice for engine rebuilds using either stock or High Energy Camshafts.