Condensor value...reading the pits?

I had a 72 datsun which would require points replacement at 3,000 miles or you would be stalled on the side of the road. Problem was constantly either too much or too little capacitance. It drove me absolutely nuts. The answer may be to simply replace them on a regular basis. By the way, everyone I have ever talked to who owned the Datsun engine I had, had come to the same conclusion.... change them often. I had the advantage of my father being an electronic technician and I was able to measure the condensers so I had an idea of where the sweet spot was but I never was able to find one that would not burn either the stationary or moveable contact...and I forget which was under or over capacitance. That was a lifetime ago.