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67 GTO Recommendations for 4 Speed

979 Views 28 Replies 11 Participants Last post by  Baaad65
My 67 has ceramic coated headers and exhaust system that fit super tight to my starter, oil pressure switch and clutch linkage. Wondering if anyone else with a manual tranny has found a better way to create space using particular headers or manifolds? I'm not into racing my car so if creating some distance lessens horsepower, I'm not concerned.
400 ci 4 speed. Thanks in advance for sharing your expertise.
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Just curious has anyone heard of or done a porting job on ram air exhaust manifolds to try and get the most out of them or is it even possible or worth it? I've heard of port matching them.
You should reach out to the guys that run their cars in F.A.S.T. I bet they port them in key areas and use extrude honing, etc.
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