Petronix Electronic Ignition Any Good?

slantsixdan said

And the distributor in the MP kit comes with an advance "curve" totally unsuitable for use on the street (two ultra-lightweight springs: all the advance dumps in all at once).

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Since when?
Even the race distributor came with one long looped heavy spring and a fast low spring rate primary spring.
Two light springs were sold seperately for those who wanted - possibly for the dual point drag race setups.
When Mallory made the MP vacuum advance distributors for Mopar Performance, they too came with a heavier long looped secondary spring. At least the one I bought and others I've seen.
This is why I am asking. DC/MP made changes without changing part numbers, so I don't doubt its possible. Again, that's why I'm asking.