GA61XX (an absolute legend if you ask me) over on Toymods has done a guide with lots of pics on how to convert a Nippondenso 2T or 2TG, 3T-c & 18R-c to an electronic dizzy very easily using donor parts from an RA60, RA65, RT133, or '85 RT142,( Not the '86 ) dizzy.
Essentially you take the coil /ignitor plus the dizzy internals and install them into your recipient engines dizzy body. See his photo here
I wonder if they will fit inside a K dizzy body.....
I only have one K dizzy here in my K engine which I am not inclined to strip at the moment, but if you are keen, I picked up all the parts on the weekend for only $55 at my picky wrecker (and that included a complete dizzy as I was in a hurry).
Full thread is here