[rdalley]

I know this probably isn't the right forum, please forgive me.

I just built a mild 355 with Vortec heads for my 64 Chevelle and I cant get the headers to seal for the life of me. Has anyone been through this and can anyone recommend a specific gasket that will seal the rounded square exhaust ports on the heads to the oval ports on my headers?

I have tried several types, aluminum, copper, etc with no luck.