318 with Edelbrok perfomer intake and 600 cfm 4 barrel, what headers please?

You say its got "Original Headers." It has headers the previous owner or one of the previous owners installed OR it has the cast iron exhaust manifolds? Headers for old mopars works like this. TTI and Dougs fit the best- do NOT route any tubes under front end components resulting in lessened ground clearance. TTI and Dougs are built of significantly thicker steel everywhere. This benefits the flange area. TTI and Dougs are expensive to very expensive. Then there are the others. Hooker, Hedman , Flow Tech and I'm sure some others are all affordable. But they route one or more tubes underneath front end steering components resulting in lessened ground clearance. Their construction is of thinner steel than the premium brands. This thinner steel being exposed to heat cycles creates flaky rusty sometimes delaminating header tubes.

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