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The rocker ratio is the same, nominally 1.5. Have you checked and double-checked the firing order?
Do it first, then:
If you have an inductive timing light, idle the engine and put the inductive clamp on each plug wire. An even series of flashes means that plug is firing. Skipping flashes or no flashes means that plug isn't.
R.

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Just to clarify, skipping flashes or no flashes means a bad plug wire .