I have a 96 Mustang GT with a moderate amount of mods. I had an MSD DIS-4 ignition system that was mediocre at best. A local racer said that I should just run a good set of plugs and wires instead. I purchased FRP M12259-R464 plug wires and was going to purchase a set of NGK Iridium plugs but I stumpled...

Are you having difficulty reaching the plugs or problems removing them? If it's the latter, try spraying some prentrating oil around the plugs. If you have trouble reaching the plugs, there are several tools designed to reach plugs deep in recesses. As I recall, this is an iron head. But if it's...