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I have a 94 350 5.7 with summit vortec heads. 750 cfm holley. What should the plugs be gapped at. Been told 45. Been told 60. 45 doesn’t run to good…bogs and stumbles.
Fuel pressure is 7. HEI in cap coil new. Accel 8 mm wires new. All check out good. AC DELCO plugs new gapped at 45. Is 45 correct for vortec heads? Summit says 60…