Lanny. I've posted the pictures you sent me of the Fenton manifolds you have for sale. For those looking at these, I think the application for these is Ford passenger car. My read on this is based upon the location of the rear mounting bolt on the driver's side. The '55-'57 'Birds' rear exhaust manifold bolt, the one closest to the firewall, is accessible before the manifold turns down. On the passenger car exhaust manifolds, the rear bolt is only accessible beyond where the manifold turns down.
Additionally, to help Forum members who might be interested, in Lanny's reply to me when sending the pictures he stated, "they are not new, have surface rust and would clean up nicely with blasting, the mating surfaces are level with a a good straight-edge, there are no visible cracks, and no repairs are needed."