bobt, I think you will find that most of the interior panel screws are going to be 8-32 3/8" long. However when I replaced mine I had some that were stripped, so I tapped them out to 10-32. Also the screw sets that many of the vendors have don"t have enough screws in them for the entire interior.
What I did was to go and buy some round head hex drive screws of the size I needed. They come in black just like the clutch heads and unless you look real close you can't tell the difference.
Hope this helps
George