You have them backwards in that you have the front one to the rear and the rear one in the front but they look like a set I bought new in the 70s made by Clifford Performance. They still make tube headers for the 235 but they are shorties now. I don't believe that they make the long tubes anymore. You can still get header gaskets from them though.
I just e-mailed you a picture of mine on my truck.
Last edited by Greg_H; 06/11/2013 9:01 PM. Reason: final comment