Yes, the bottoms of the door panels screw through the carpet (on the door panels). The screws have shoulder washers, and I think there are four or five of them across the bottom.
The arm rests should have a couple of screws into the door frame assembly.
To clarify, are your doors (meaning the door latch and window crank assemblies)set up for standard or deluxe door panels? That will also make a difference. The deluxe door panels require longer spindle assemblies.
I used to be indecisive. Now I'm not sure. I feel like I am diagonally parked in a parallel universe. 1968 400 convertible (Scarlet) 1976 T/A - 455 LE (No Burt) 1976 T/A New baby, starting full restoration. 1968 350 - 4 speed 'vert - 400 clone (the Beast!) 1968 350 convertible - Wife's car now- 400 clone (Aleutian Blue) (Blue Angel) 2008 Durango - DD 2008 GXP - New one from NH is AWESOME! 2017 Durango Citadel - Modern is nice! HEMI is amazing! 1998 Silverado Z71 - Father-daughter project 1968 400 coupe - R/A clone (Blue Pearl) (sold) 1967 326 convertible - Sold 1980 T/A SE Bandit - Sold