What spark plugs do you think I should run for my combo? Stock-style, but one heat range colder? And also, what about Iridium plugs? Since the electrode is smaller I have always thought they would foul quicker...but sources I've read recently say they last longer, and require less voltage to produce a spark.... What do you guys think? I need a new set because I THINK I fouled one out, although they dont look bad at all. High-speed glazing, and slightly lean.