Procedure AR68.20-P-2350F applies:

1) Remove radio (using radio tools).
2) Unscrew screws under top edge of radio opening.
3) On vehicles with automatic air conditioning remove pushbutton panel (using radio tools).
4) Pull panel back at the bottom and down at the same time to get top edge out from under the dash wood trim.
5) Disconnect wiring.
6) Remove wood panel.

It is not necessary to remove the dash wood trim. I think you must have the dash out to perform that procedure.