Manifolds gasket

www.pentastarparts.com.au has the gasket you are looking for. They call it a hotbox gasket and it is a composition gasket that is graphite impregnated. Costs around $11 plus shipping. You can use PayPal or major credit card. They also have the intake/exhaust gasket made from the same material. They seal really well and so far they are holding up good on my Valiant. Takes about a week to get them here from Australia. Hope this helps.