Pontiac GTO Forum - View Single Post - `67 Bonneville 428
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post #1 of (permalink) Old 05-18-2016, 11:10 AM Thread Starter
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`67 Bonneville 428

Is the B-body 428 timed the same way as the 389 and 400? I have one here that is plumbed to manifold vac and falls on it's face only when the 4bbl opens. Should it be ported? All tune-up parts look good.
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