I have the stainless a member here makes. But can’t remember who. If flanges and head are flat and clean I’ve also used copper rtv. But I’m a hack.just looked back Barry. It was Jeremy (bubble top man). Hasn’t been here since 2018.
We had SCE make a pair of flat copper. I don’t think they really do anything though and I put them on with ultra copper. I think the ultra copper is what does the sealing. But I am also a hack.
Black sealer...let it set up before installing. Dog hunting right now in Colorado but can get product info in a couple days if interested. No more gaskets 4 me.
Ported my old ones with a Drimell. Bought some Edelbrocks but they are a three piece gasket and they drill the bolt holes 7/16 so unless you glue them on first you don’t know if they’re square to port or not!! Would still have had to port them to!