Dave, i was told by a man in TENN. that has a distributor shop that you should widen spark plug gap and use 8mm. wires with that system .have not changed my car yet. have done 2 IH. trucks in the past with good results they were not flame thrower III his name is Bob Soucy he also sells the systems and has a shop &tech info #
 239-6713971 good luck keep us up dated!

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Comment by Jason Edge on May 26, 2015 at 8:59pm

Just to add I went back and read the instruction on the Flamethrower III ignition coil and it states:

"Spark Plug Gap
In stock applications, the manufacturer's recommended spark plug, and spark plug gap will work best. For performance applications, the spark plug gap may be increased up to 0.010" from manufacturer's specifications to take advantage of the extra energy, produced by the Flame-Thrower III Coil."

Comment by Jason Edge on May 26, 2015 at 12:01pm

If you are running a Flamethrower II or III coil with higher potential voltage you can increase the plug gap. I think I went from .035 to .040. If you are running a stock coil I would keep at stock plug gap. 

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