You are using a Waste spark system so need to gap the spark plugs Pairs the same, 2 spark plugs are wired in Series, 1/5, 2/6, 3/4 are wired as pairs
If you gap #1 at .045 then gap #5 the same, ect............

Have you added Seafoam or Octane boost to the gas tank yet?
These can help clean injector tips and absorb any water in the gasoline allowing it to pass thru the engine without causing a misfire

All gasoline has water in it, "bad gas" is when there is too much water
Water can't mix/bond with gasoline, and water is heavier than gasoline, so it settles to the bottom of any fuel tank, like in a vehicle or gas station tank
Gas stations should have a "sump pump" that pulls any water out that has settled to the very bottom of the tank, and the pumps that are used to fuel vehicles pull from a few inches ABOVE the bottom of the tank.
But when fuel trucks add gasoline to the tanks this can stir the water back up and you get some of it when fueling up, takes a while for water to settle back to the bottom of the tank.

Products like octane boost or HEET are ethanol and ethanol CAN mix/bond to water in the tank, and ethanol can burn with water bonded to it.
If the gasoline you use already has ethanol added then you are covered so no need to add more, unless you do get "bad gas" which is alot of extra water