I heard that after a certain amount of gap that it can negativly affect the flame pattern, etc. Im unsure of this and my 67 still has them gapped at 80 i think. But thats with my all msd ignition and i havent even seen my 67 in hummmm6 months.
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1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!
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