Goatless here on the board is running mid 12's consistently through log manifolds in his 69 LeMans convertible - the exhaust should be fine if you're willing to put a test pipe in place of the converter or at least hog it out.
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Some guys they just give up living
And start dying little by little, piece by piece,
Some guys come home from work and wash up,
And go racin' in the street.
Bruce Springsteen - Racing In The Street - 1978
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