from what i am reading on my google searches, it has to do with the leaking from the solid core wire after it has aged etc....it can mess up the ignitor part in the dizzy itself. the HEI wire can still do that, but it is less prone.
so the moral is have really good not broken or fraying solid core wire and check it often and you wont have issues, or just go to HEI wires which i guess last longer, idk.
there is a guy in this thread running Packard solid core wire for many years with no problems. so i may give it a try. i bought the stuff now i might as well try it. if it goes bad i have several other points setups i can pick from in my parts bin. i'll just carry the parts in the trunk.
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