My $0.02
* 2nd on sound deadening / insulation
* Inspect all of the wires / Plastics for brittleness / Heat damage and replace any that concern you
* Run any wires you expect to need Ham/GMRS/CB radio/ lights for roof rack...
* Make the map lights up front come on with the doors.
Toyota 4Runner Maplight Mod or search "map light mod" here on the 4th gen forum for other methods.
Boort