So I have an '86 Ford 460 with the good ole Duraspark Version 2 on it. The other day it would not start, so I check fuel, spark and no spark. So, go through wires, cap, distributor and I find the "magic box" is bad. I get one from O'reilly's for $26, replace it and everything is good. My question is this, what makes these boxes go out? I ask because when I found where the magic box was, there were 2 of them. Apparently the original went out and rather than remove it, they just bolted the new one next to it, that went out on me. Seems like a repeat problem for this vehicle. Ideas?