After wiring everything up to the Teensy++ and trying my hand at building the TMK firmware I stumbled across these two sites which helped immensely.
http://www.keyboard-layout-editor.com/ -create custom keyboard layouts
http://kb.sized.io/ -build firmware off the layout
I was able to create a layout and visualize the wiring. That worked and then came the task of wiring it all up in the TMK firmware generator.
In the end I had to modify the code by hand as the author doesn't support the Teensy+ pins. Also, the pinout was a bit different then most as this keyboard has 17 columns and 10 rows.
Some of the keys are still waiting to be assigned. It seems that this may be a kind of Chinese/English layout so the 'odd' key pairs have to be dealt with like @ '
All in all it was a fun learning experience and now I have keyboard from 1985 on USB
.
Now if I could find a custom case for it.