taking out the interior: how hard is the process?

[munroe]

once my 87 gets into the spare shop im planning on taking the interior out to lay some dynamat down on the floor, the roof, the firewall and inside the doors. the interior in the truck is in really good shape. the thing im wondring is if i take out the carpet, how is it going to fit once its reinsalled? ive seen people haul out their carpet only to have it never fit properly again.the headliner in the truck is shot so im not worried about that.heres what the interior looks like now, so you can see why i dont want to destroy it