Its a '74 manual, although E bodies did not change through their run.

1970 reproductions can be picked up here on CD, $70 each.
http://moparmanuals.com/mopar/main/home....amp;submit.y=10

You also can search out the dealer service bulletins on AAR/TA models which may have a few tid bits of info. Since non of these are reproduced, that I'm aware of you might start with Hamtramck Historical: http://www.hamtramck-historical.com/