Well I ordered it.. I got the 14mm plug size.. this looks like it will be a fun project.. this US41 has always ran excellent.. it's just a heavy beast.. I'm hoping to shed about a pound of weight.. I'll probably use a 1450ma NiMH for the ignition pack.. It's installed on a Kangke Cap 232 that prior to this modification weighed in at 14.5 lbs... it flew pretty nice.. just had that heavy feeling.. 75 bucks is worth it to me.

When I start doing the conversion I'm sure I'll have more questions.. getting the timing right will be a big concern..

Thanks to everyone that responded!! anymore advice you can give will be greatly appriciated!