These fabricated valve covers for 1955-1986 283-400 engine blocks that use the outside "perimeter" bolt pattern. Factory or aftermarket cylinder heads. They are 3 3/8" tall with a nice polished finish. The rail is very thick to make sure that you never have sealing or leaking issues. They also include the Allen Head mounting hardware and 1-1/4'' baffled breather hole. Black Anodized Finish
