The first step is to trim the passenger floorpan. Measure 12" from the front of the floorpan and draw a line. Measure 15 5/8" from the right side of the floorpan and draw a line. With a saw or cutoff wheel cut out the section shown below:
You'll have a cutout that looks like this:
and the floorpan will look like this:
Install and drill the new panels in the following order. DO NOT RIVET until all panels are installed as you have to move the inside panel to fit the front panel as shown below. The rivets that hold the panel closest to the engine to the floor panel and the front panel to the floor panel must be riveted from the inside of the foot box.
Floor pan
Inside panel (closest to engine)
Top panel
Front panel (you must spread the inside panel to slide the flange inside)
Outer panel
The completed footbox will now look like this:
