Has anyone ported stock magnum heads and have the before and after flow numbers .???

RustyRatRod said

I think people have proven the pushrod pinch really isn't a big deal on these. Maybe @MOPAROFFICIAL will give us some answers.

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Over on Speedtalk there is a CFD thread and it proves the “pinch doesn’t matter” talk to be bullshit.

It matters. That’s why Chrysler (and everyone else) ends up with offset rockers.