Copper exhaust gaskets

Thanks for the suggestions! :cheers:

The only Percy gasket I found was their #66037. They have the same (wrong) square outside port configuration. Just like the Mr. Gasket #7166s, they are listed (wrong) for ''68-'73 340'.

A Remflex #6027 set is on the way. At least their outside ports are the correct shape.

The Remflex gaskets are thicker as mentioned and they are fairly soft (they squish).
I had to pull the passenger side header off one day and the gasket was just fine for reuse.
They don't burn to the engine block or header flanges so they don't get torn up when removed.
You are going to love em.