273 Exh Port MisMatch

str12-340 said
You really lost me here... dies "never intended to use gaskets refer to the presses metal gaskets that were original???

Another clarification: " rear firing" manifold means rear facing exit???
Click to expand...
He's talking about "some", but not all. Some of the small blocks through the 70s never used exhaust manifold gaskets. They used the flat machined surfaces to seal.