Hey
Just add my two cents, unless your dizzy is shot i wouldnt waste money on one of those. The electronic conversions are really good. I fitted a pertronix to my Herald about 12 years ago. If your dizzy is fine then theres little point replacing it. drop $100 on a conversion kit and a also throw on a sports coil .. later if you find you need more put the money you saved into a megasquirt.
IMO at least.