Edelbrock heads with OEM manifolds

mgoblue9798 said
I haven't tried it but running a thicker remflex gasket or even doubling gaskets on that side may work.

I personally wouldn’t try double exhaust gaskets. It may hold, but I’m not too warm and fuzzy on the idea. Worth a shot!

A56 said
IMO, knowing what I now know thanks to those experienced with this endeavor and as expensive as heads, headers and even factory 340 exhaust manifolds are anymore I'd lean more towards either spacing the stock manifolds out or headers.

I second that. Even on a very mild cam and compression engine, it’s a winner.