318LA driver, mopar built Electronic distributor. anyone better than others ?

Earlier the better and high performance the better. You can look the specs up in the back of the factory manuals. Having said that, a typical parts store "rebuilt" is anybody's guess. On the other hand you can recurve them, and FBO has a recurve / limiter kit

How to limit mechanical advance in a mopar distributor, tuning for street, strip or all out racing, cure that rich stinky idle, win races

Many of the mechanical mechanisms are stamped as to advance. Remember tho, this is DISTRIBUTOR degrees, you multiply that figure x2 to get crank degrees

Start with the 72 Plymouth shop manual from MyMopar page 8-139

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