Just let me know if you'd like this one in a better resolution
It's indeed pre '74 (instead of pre '73).Looks good! It has the wiring in there for the automatic transmission.
Just to understand what you are sharing; did you draw this up yourself? (I've never seen it before, but I'm not electrically gifted...)
Also the title says "pre 74", but the file reads 'Pre 73'.
Some members may whish to get this printed and use it in their garage - for that purpose the high (est) resolution image that you can upload would be best.