What you are describing in pretty much exactly what i did on my last 2 Door. Body drop stuff starts on page 5 of this thread.
https://www.gmt400.com/threads/my-97-2dr-hoe.9076/
The first and second pictures are of the passenger seat. I only replaced the bottom cover. Also deep cleaned the top. The third picture is of the drivers seat with the new foam and all new covers.