PRW 0230205 1.6 x 7/16" Stainless Steel Rocker Arm for Ford 260-351W 1962-01, Pontiac, AMC and Oldsmobile Premium quality 15-5ph stainless steel rocker body CNC machined pushrod cups and heat-treated Cr40 roller tips Fully caged friction reducing needle bearings Designed to clear large diameter valve springs Lifetime guarantee against breakage on rocker body