Just got some new ford racing wiresand an msd coil so i put them on with the exception of the coil wire which was too shortand retained the motorcraft wire which was still 8mm. before i changed the wires and coil the car ran fine, now it runs rough . The wires are on in the correct position. Now im getting a heavy gas smell and a sputter from the passenger side which sounds like an exhaust leak but there is none. Does it have anything to do with wires being 9mm and spark plug gap, I dont know can anyone help. Id like to get my car back to running good again. Thank you.