It's too bad that Percy's don't make those seal-4-good dead soft aluminium gasket's for Pontiac's. Anybody tryed Percy's XX Carbon Exhaust Header Gaskets?
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78 Firebird. 0,30 400 cid, speed pro domed 0,125. Xe 274. Eagle H rods. fully balanced. ported 6x heads. Rpm inntake . 800 edelbrock. prepped th350 whit 3000 stall. 
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