Stop in for a cup of coffee

@halifaxhops Hoppy have a question for you . Went to the drag stip last Sat. with Sons 440 duster. ,he has MSD 6 AL ignition . We tried to find NGK spark plugs but nobody had any in supply so we went with e-3 . No matter what he did he had a high speed miss . Any suggestions ? Anyway to check the plugs?