I have a set of longbranch roundport f-body exh manifolds. 9794038 date code G108(july 10 68, Ram air II) and 9794037 date code D268(april 26 68). I cannot find any part reference for the 9794037 manifold. I've had these manifolds for a long time since before they were reproduced. I think they are both ram air II but I've not found any source to verify this. Thanks for any help and input.