Bob,
The Perma-Tune doesn't replace your points ... just the CDI-unit! I strongly recommend that the distributor be removed, partly disassembled, and cleaned and lubricated every couple of years. If excess play or wobble is found between shaft and bushings, the bushings can be replaced with parts from an industrial bearing store.
The following thread has a generic Bosch exploded diagram of a distributor and specs for your distributor -- to check the advance curve before you have further running problems due to stuck advance weights:
http://www.pelicanparts.com/ultimate/Forum3/HTML/009677.html
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Warren Hall
1973 911S Targa
1992 Dodge Dakota 5.2 4X4 parts hauler