thanks for the conversation, pete.
it's neat to see what was state of the art but never caught on. Now electronic ignition is popular.
i also found a link to a build your own transistor ignition project if anyone is brave--it's much simpler than the amplifier system you installed and uses the original points as a trigger. http://www.cs.berkeley.edu/~wkahan/TransIgn.pdf
then again, pertronix has a warranty and could compensate for a worn distributor cam.