"Performance Distributors Firepower Ignition kit"

After reading the XJ mpg article on another site I'm thinking seriously about buying the "Performance Distributors Firepower Ignition kit" for my 1998 Jeep XJ 4.0L.

I'm a little concerned about the additional size/heat of the spark burning a hole in the piston. Anyone heard of this happening to a 4.0L?

Also I've been sending PM's to xjtalk vendors asking if they sell this product. I certainly want to give our vendors first shot at selling this. If you haven't received a PM and you do sell this product either post here, or shoot me a PM.

I'm ready to pull the trigger on this product, as long as I don't get any bad news on it. ;)