67 Barracuda Dash harness install

My recollection is the heater controls may have a set screw underneath each knob. The instruments themsleves are attached to the chromed plastic panel.
Disconnect the speedometer cable from underneath. If you can take off the headlight connector, great. Otherwise the recommendation in the '68 manual is remove the head light control switch knob and step, then the retaining nut. (this is not fun - to remove the knob and stem, there is a little metal release button on the switch itself. ) If I can find my crib notes from when I removed the instrement panel in my '67 Barracuda, I'll post anything additional that seems useful.

Send me an email (use PM or my e-mail under profile if it lets you) and I'll send you the pages from the '67 Supplement but they are not a lot of help here. '68 Shop manual is a bit better for this.