I have a vortech V3 supercharger on a 1993 5.0. It has ported and polished heads and intake. Aftermarket exhaust and a Pro M efi system with individual coils on every cylinder. I'm running a 3.25 upper pulley and a renegade crank pulley. It has a stock cam and I shift at 5300 rpms. What gap should the spark plugs be for this combination?