Notes:Internal measurement for these valve covers is 1 3/4" measured from gasket surface to the deepest point in the valve cover. These valve covers have oil drippers cast in. These valve covers CANNOT be used with a full aluminum roller rocker. Roller tip rockers will work. These valve covers will generally work on power brake cars. The total overall height with the gasket, installed on the head is about 2". Please make your measurements to be sure you have clearance before ordering.