Brake Noob

Nice job. thumbs_up-gif.gif

Turn the self adjuster overload springs the other way.
I don't know why, but that was repeatedly mentioned in the service bulletins.
Drum Brake Service Highlights (Session 260) from the Master Technician's Service Conference

The 1970 Hamtramck Registry "1969 DODGE MODEL TSBs Index" Page

Note the lining thickness for future reference.
Also the two letter friction code on the lining edge or on the backing plate.
When you go to replace, these give a ballpark idea that the replacement lining will have similar friction to what you have now.
If yours are FF, and the parts store only has EE or ED, you can be pretty sure you'll need more force on the pedal to stop the car. Its not a very precise comparison and certainly doesn't cover all the braking characteristics of a lining, but its something to be aware of.