Looking at the E-tec head it has standard size exhaust ports. Edelbrock recommends 1.500 x 1.500 square port gaskets. They are composite with steel core. Edelbrock Replacement Gaskets for Edelbrock Headers 7204 - SummitRacing.com
. Percy's has header gaskets made from multi-layered "dead soft" aluminum. They're virtually blowout and burnout-proof and totally reusable. Percy's Seal-4-Good Header Gaskets 66012 - SummitRacing.com
Check your headers to make sure the exhaust ports line up.