being an engineer I have a bit of a different take on looking at the EI modules.
1, all they are is a solid state switch. using same supply voltage to coil, they should give you about the same spark as a WELL tuned breaker ignition system with new points, adjusted correctly. No magic.. no hotter spark.
spark voltage is a function of spark gap and compression. if it takes 8kv to jump a .025 air gap under 135psi AP, then that's when it jumps.. when voltage reaches that potential. don't matter if you have the ability to make 8.5kv or 90kv.. it jumps at 8kv.. PERIOD.
that said, if you live in wed areas and have constrantly oxidized poitns, then yes.. it makes a tangible difference. or if you are not the kind of person who knows how to maintain a points system.. same deal.
ei will not make up for a bad advance, though may help a small amount with worn bushings, as the halleffect sensor may still trigger fine, whereas worn bushings may cause irregular spark gap, and the issues that go with it.
ei come in 2 flavors.. smart and dumb. the dumb ones leave power to the coil as if points are closed if engie stalls and key is on, and can burn up / kill coils just like points do. Some of the smart ones will auto sense non running and power off.
run the correct coil combination with the ei that the manufacturer states. running a coil with too low of a primary resistance will damage the ei.
ei, on agerage, costs as much as 7 sets of SUPER PREMIUM breakers.. 11 sets of mid grade, or 23 sets of cheapies.
On average, I get 10 ys out of a set of mid grade points.. and 6 out of the cheap ones. The premium ones.. I have some with 13ys on them and no sign of going bad. At that rate, for me anyway.. EI is not worth it as an investment.. I won't live long enough to save money on a single ei vs just buying a decent + set of points ever 10ys or more. If I was 18 ys old? EI would pay off when i hit post retirement age..
one other thing. ei are not robust.. similar to an alternator.
hook up your battery backwards and yer alt fries in about 400 nano seconds. I'd wager the ei will go about that fast too.
a genny / mechanical vreg, and points? they usually survive just fine. in fact.. points don't care.. genny don't care.. cut out contacts int he relay care a bit.. might weld.. but you can pop them apart and sand em,
lastly.. 6c vs 12v. If I was going for an EI system.. i'd think long and hard about converting to 12v negative ground first.
On ford front mounts, and wanting to keep the oem square coil? it's almost mandatory..
those ar emy observations from an electronics stand point, and a user / owner of both types of systems.
PS.. there is a hobby kit that uses your breaker contacts in a low current setup as a switch to trigger a transistor, that then fires the coil. if htis setup, poitns can last to the extent of their mechanical abilities.. ie.. spring and rubbing block life..e tc..