Is it OK to run a "thick" style gasket with Exh Manifolds? I know mine have a small leak, but I run OE style metal stamped gaskets. I am afraid of cracking a manifold, maybe by unevenly torquing the manifold down? Round Port Long Branch manifolds are hard to come by.
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1968 Firebird 400 RAII M21, 3.31 12 bolt, Mayfair Maize.
1977 Trans Am W72 400, TH350, 3.23 T Top
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