The Hemi spark plug's location near ... of torque at 4,200 RPM for a dual four-barrel carburetor equipped Ford 427 SOHC. The fairest comparison is likely the 426 Hemi dyno test reported by ...
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9 Of The Best Engines Ever Put In A Mopar Muscle CarThe 426 Hemi was first made available on a street ... Other notable features included aluminum cylinder heads and dual spark plugs, akin to some classic Mopar drag-racing engines.
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