I am putting a new Bosch ignition in my Mustang this weekend ( Cap & Rotor, Ignition Wires, Coil Wire, Spark Plugs ). I was looking for some recommendations on which spark plugs. I know it won't make too much difference in responsiveness, but every bit helps. Should I go with the standard Bosch Platinum plugs or the 2 prong or the 4 prong plugs? The 4 prong plugs are considerably more expensive (about $10 each in Canadian $$$) but if they increase performance at all then I am willing to pay that. Any help would be appreciated.