Not sure the year of your truck. For the AD I'd say there is two pieces for the floorboard sides, a tranny cover in the middle of the floor, and a one piece toeboard. This gets you to back against the seat riser.
Since the toeboard is usually only bad just a little above the floorboard I bought the two pieces of floorboard that comes as one piece but has "half" a toeboard all in one piece. That way you only but across half the toeboard. Its been a while but those two pieces of floorboard was only about $55-$60 each but may have went up a few dollars. Can you replace the floorboards and repair the section under the seat area? Its flatter and would be easier to do.
Here is a pic of the two pieces of the floorboard I used. (the two big pieces)
http://i140.photobucket.com/albums/r19/LutherParris/52Panel/PanelBodypics005.jpgNot sure this help but maybe someone else will chime in later.
Oh, and IF you get into the side cowling there is a inner cowl, inner to outer cowl, and an outer cowl piece. IF your lucky maybe you will only need the lower outside piece?
