I have a set of BBC 990 rectangular port heads that was just cleaned to bare metal and mag checked (good, no cracks) at the shop. Customer is now considering replacing with aluminum. All hardware (valves, springs, retainers, locks, studs and guide plates) included, although I would recommend replacing valves and springs for a fresh build. Located in Parker, may be able to bring to Billy B show Saturday if I have them back in my hands by then, $600