9.1.3.e Front passenger seat, rear seat back, rear seat bottom cushion(s), sun visors, seat belts and their attaching hardware and bracketry may be removed.

9.1.3.l. Ballast may be used. All ballast shall be located in the front passenger footwell/seating area, aft of the firewall and any footwell angle, and forward of the aft-edge of the forward-most passenger door opening, unless otherwsie specified on the vehicle’s spec line.OEM front passenger seat location.

So can I remove part of the sheet metal seat bracket that is welded to the floor in order to mount ballast so that it lays flat?