Wanted: 340 Exhaust Maifold Gasket

When they were new they were flat so the sealed metal to metal fine.. I would use a gasket there now. After 40 years, They arent very flat anymore.

You can get the driver side manifolds on ebay or from mancini Racing, They are expensive though, About $125. I would just use a Felpro set though. Probably under $20 new.