SC/VC-16 GMC 270-302 Finned, cast aluminum Valve Cover. Polished cast aluminum rocker arm cover (valve cover) For GMC 1939-1962 228-236-248-256 and 302 cubic inch inline six cylinder engines. Our own product. We made the design, had the tooling done, have them made in a local commercial foundry which also makes aluminum parts for the Big Boys, like Kenworth trucks. Also, this is being done in Oregon U.S.A.. Comes with valve cover gasket and oil caps. We make these to order when we get orders.