You can never really know anything until you try it yourself. So I encourage you to try the Pertronix but don't set your expectations too high.
Back when I switched to the ignitor 2 with the matching flamethrower 2 coil, I noticed no difference. After I fried the pertronix 2 (It has protection but I left the key on while doing something and then it would not start), I reinstalled the points and it actually felt stronger.
My opinion about the points replacements (Pertronix and others) is that they can mask issues, such as a worn distributor shaft or points cam and make it run better because the signal is not dependant on direct contact of mechanical components. So if you have a worn out distributor, you might notice an improvement but if the distributor is in good condition you may not notice a thing - and you spend good money for it.
Since then, I have converted to a Duraspark distributor with an external box. This did seem to help off idle, at the lower revs, but above about 2000rpm, I can't notice a difference.
Now, I never did any dyno testing or before and after 1/4 mile passes so I don't know just how things changed. I can only rely on how things felt, and the more expensive ignition actually felt better but at low rpm only and it wasn't what I'd call a night and day difference.
I'm not trying to undermine the importance of a good ignition, but I think depending on your goals, the money can be better spent elsewhere. And again, there is no replacement for actual experience with a product.
Another thought about the points conversion, the common assertion is "if you have a problem, you can just swap your points back in." This is true, sort of. You are also going to have to keep in mind the coil you are using. If you get a Flamethrower 3 coil to go along with your Ignitor 3, the points probably aren't going to last long. So, you also need to remember to carry a spare coil. Maybe you can use a points coil with the ignitor 3 (read the instructions) but then do you really get the most from your ignitor 3?? About that points coil, does it require the use of a resistor? Are you also going to have to carry a resistor around so you can swap it along with the points and coil, "just in case?" You can see that the "just swap it out" idea can be more complicated than it seems at first.