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Thanks to all for your advice. I am not good at speed tuning, I can tear an engine down and rebuild it but am ignorant when it comes to knowing what works well together to get the most bang for the buck
Actually the manifold I have is a dual plane, it doesn't have 7503 on it. It just has the Weiand name 2 places. The manifold I have looks a little different from the picture above. And thanks Darter for the info, I will look for a 6oo Edelbrock. My intent was to use the stock exhaust manifolds...
Could anyone tell me what 4 barrel carb I should use on a stock 318 poly motor? I recently acquired a Weiand dual plane manifold and should I consider putting a mild cam in as well?
This is an interesting idea, I am a patternmaker and actually thought about creating a fabricated poly manifold from a similar sized standard engine manifold, But it would be easier to just find one so i am going that route first to see what happens.