I'm installing some coated headers and am wondering if the copper gaskets worth the extra $$. also my RPm heads have a square port. The
felpro 1404 gaskets are the right shape but I've only seen round copper gaskets. Are the copper gaskets worth having and if so do they make 'em
like the 1404 ports. I'm assuming the gasket needs to match the shape of the heads. I know somebody knows this.

as long as the gasket matches the pipe- which should be round- and doesn't hang into the port at all, the round header gaskets will work.