Mike,
Is your Permatune unit Blue or clear anodized? The Blue units are usually quite reliable ... the clear/silver ones not so!
You can test the CDI input signal from the Pertronix Ignitor with a 12 Volt test lamp connected to the triple fuse block. If you aren't getting an interrupted ground signal during cranking, then the problem is with the Pertronix Ignitor. Most people say you should carry a spare set of points with you at all times for when the Pertronix fails. That doesn't say too much for the expected reliability of the Pertronix to me!
http://forums.pelicanparts.com/showthread.php?threadid=226517&highlight=cdi+history
At this point ... with the wiring and connectors 32+ years old, I suggest thorough cleaning of the Faston connectors with 91% isopropyl alcohol on Q-tips, rinsed with distilled water and dried, then cleaned with 9% pickling vinegar, then rinsed and air dried again as indicated in the following diagram:
Your Permatune can be tested with a remote starter switch wired to the #50 starter solenoid lead #1 Yellow wire at the forward 14-pin connector on the electrical panel on the left side of the engine compartment. A permanent remote starter switch on that panel can be helpful.
A test can also be done with the following circuit I call my junk-box calibrator -- it can also be built with parts from Radio Shack or any electronics supply store:
Good luck!