[68TopStock]

Look on the bottom side of the manifold for cast dates, a few of the prototype manifolds did not have a production number (302 small block ones), who knows, maybe Chevrolet was experimenting with Winters foundry on a bigblock crossram, and did not want it identified. Dick Harrell would have probably built your car, anything could have happened with his connections. I would buy everything that fellow has now, and sort it out later. Most likely your car was delivered by Yenko with a single 4 barrell manifold, and maybe these items were added on after delivery to the original owner. They are still important pieces to your cars history, even if added on later. BTW, do you care to share any pics of your car?