Change the spark plugs. Yep, I know they're new- - - -doesn't matter! Once some plugs have been fuel-fouled, they just don't work. Why is he wasting money on all that hotrod stuff? All he's buying is the name. Original-equipment AC parts are as good as it gets. Buying race parts for street use is like pounding sand down a rathole!
Edit: If he simply insists on trying to re-use the fouled plugs, at least pull them and get the tips red hot with a torch to burn the fuel fouling away. SOMETIMES a fuel-fouled plug can be salvaged that way, but don't count on it.
Jerry