OK, So if it has an upgraded ignition system I normally go with MSD or Taylor 8.5mm wires and I have been running Accel u-grove header plugs. They header plugs are shorter to give more clearance between the boot and the header. Depending on compression ratio of the motor you might want to play with the gap to fine tune the spark. I had to close teh gap on mine when I went from 8.5 and stock ignition to 9.2 to 1 with a full MSD.