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corrosion suck up ? I have never heard anybody worry about that before.
factory five headers most likely will NOT fit a Kirkham.
ceramic coated mild steel headers should fit your bill well.
Least restrictive headers, you gotta go custom and spend a pile of money. They will be tuned to your specific motor.
You are worrying about things that will have almost no impact on the amount of fun you will receive fron your car. I know you want every single HP your motor will make, but I doubt you will notice the difference of +/- 20 hp as you are spinning your rear tires hoping to finally get traction.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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