When I went from a 427 to a 351W in my Contemporary no one made headers for it I searched around and it looked like the Shell Valley side Pipes were similar. I figured if the side pipes were similar then the Shell Valley small block header would connect to my Contemporary side pipes.With some minor tweaking they fit without any modifications to the foot boxes. Contemporary is no longer in business but Cobra Restorers in Geargia advertises that they have headers and sidepipes for Contemporary.
If this helps give them a call.
Cranky
BTW why would you want to put such a stone in your Cobra?
