66 with 200 six. I've been trying to figure out exactly what exhaust donut or gasket to use. The exhaust pipe has a recess that a tapered donut fits in, but the manifold does NOT have a bevel on it, contrary to photos I've seen on parts sites. My manifold has a completely flat surface where it mates to the pipe. It seems as if a flat type gasket should go against it. Perhaps I have a manifold from some other application???

I believe it's a C2xx casting--I'll check for sure later to get casting #.

Any ideas?

 

If its C2 then its from a 1962 vehicle.