Denny - distributor cross-firing still needs to be checked. Advance at WOT would be different than at part-throttle. Thus an intake valve partially open at part-throttle misfire might not be open at a WOT mis-fire.

When we had the carbon gap problem, the engine would NOT misfire under WOT conditions.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
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