68 dart dash pad install

I did it. I would remove the instrument cluster the heater/ac bezel and the glove box door and glove box. From those three access holes you can get to the nuts on the back.
this

Don't forget the two 5/16 screws on the lower corners at each end of the dash too.
and this. My replacement pad didn't have these- if I didn't already know the old one had them, could have been pretty tricky getting it out.

Also, my old one was so bad that I didn't mind bending the crap out of it taking it out- and that actually made it easier.