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Re: Mad Dog 67-72 Big Block 4x4 headers
I went back and forth on headers with my 4x4 big block project. After beating my head against the wall I went with factory 1970 GM Chevelle SS 454 manifolds for a few reasons....
-Super tight to the block and have no problem clearing the frame rails
-2.5 inch 3 stud flanges so you can use factory hardware and donut gaskets
-More than enough flow to support over 400 HP
-They don't leak and loosen up like headers causing embarrassing noises
-Enables you to use the factory plug wire heat shields so burning plug wires isn't an issue anymore
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