Only the bezel around the radio/AC controls need be loosened to install the CDL switch, the dash 80 is complicated I would not dive into it blind without a plan.
Figure out about where the noise is even better if you can isolate it to a part, try applying pressure to the panels and parts with your hand and see if that stops it, would hate to be deep in the guts of the dash if a speaker grill was the rattle.
A Government Is a Body of People, Usually Notably Ungoverned, Shepherd Book
That rifle on the wall of the labourer's cottage or working class flat is the symbol of democracy. It is our job to see that it stays there. George Orwell