Simply loose the points and the condenser. I've used these modules:
http://www.mytractorforum.com/showthread.php?t=115151 There are a number of varieties for different kinds of engines. I did a conversion a few years ago on a 35 YO mower and I've really been pleased.
ebay, wherever: **broken link removed**
http://www.amazon.com/Mega-Fire-Ignition-Module-UNIVERSAL/dp/B001OK9ZFG
Vibrator caps were rated to 1200 or 1600 V, such as these:
And then there is this guy selling these:
http://www.jerry-howell.com/IgnitionModules.html
Go back to when I was 10 YO and hadn't heard of a capacitance meter and I had a VOM back then at 50K ohms/volt. If you find the cap shorted via a resistance measurement, it's BAD. If you test with an ohmmeter on a low scale and reverse the leads and get a "blip" then it might be good.
The caps are HIGH voltage. Think of it this way. if you had just the magnets and a coil, your generating electricity. the idea is to store this electricity in a capacitor. Now, when you OPEN the cap, the cap discharges into the coil.
So, it's kinda like generate, store and use as a pulse.