Justin, it's worth being clear about what after-market electronic ignition systems can actually do to 'improve' your car:
2 basic things: (1) they reduce the need for regular points maintenance, and (2) they help maintain the ignition timing, and hence performance and fuel economy. They won't actually improve performance and economy over what a perfect condition 'standard' system will do.
(I'm not including advanced systems like programmable megasquirts and the like in this...!)
What I'm saying is, if your points are set up perfectly and the rest of your ignition system is also in excellent order, then you will already be achieving the maximum performance and fuel economy for your car. However, the problem with points is that they 'arc' and this erodes one side of the contacts and the 'stuff' crosses over and builds up on t'other - ergo the gap will alter, timing will go out, and perfonomy (gettit  ) will suffer. Therefore, if you only clean and reset your points once every year or so, then by the time you do this, it's very likely that your timing and perf and onomy will have deteriorated by - oooh - 10%-ish? I read somewhere that your carefully set up points will start to noticeably go 'out' after only a few weeks... 
So, if you are happy to file down and reset your points every, say, 6 months, then your car should continue to run at pretty much peak levels - no need for going leccy.
Taking into account cost vs benefit, one suggestion I'd make would be to consider adding an electronic igniton device such as a Boyer or Sparkrite type unit. You will still keep your points, but they won't spark-erode any more; they should therefore keep their timing for well over a year, probably much longer (the gap will still alter a tiny amount due to wear of the cam lobe against the breaker arm, but this will be minimal.) You can pick up these units for around £15 on fleabay, so good value. (They should also provide a heftier spark which could help when starting with a weak battery or in cold weather, or might help to overcome the effects of less-then-perfect cables, etc...)
If you can afford it, then a fully electronic system (Lumenition or 123 type stuff) will replace your points and - if set up correctly in the first place - should mean that your ignition system will stay at peak setting for ever...
Neither, tho', will actually improve anything over what a perfectly set up standard system will do. To the best of my understanding!
(I have bought brand new 'old stock' Sparkrite ignition systems for my Chevaux...)
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