Methods for modifying truck cabs and doors

A method of modifying a cab assembly of a Class 5 or higher truck, the cab assembly including a cab, the cab having an original cab height from a cab bottom end to a cab top end thereof, the cab including a bottom region, a window region located above the bottom region, a roof region located above the window region, and a window defined in the window region, the method comprising:

• cutting the cab through the window region to divide the cab into a top section and a bottom section;
• thereafter
• joining the top section or a replacement top section to the bottom section to form a modified cab, wherein the modified cab has a modified height from the cab bottom end to the cab top end that is less than the original cab height;
• and
• modifying a door of the cab assembly, the door having an original door height from a door bottom end to a door top end thereof, the door including a door bottom region, a door window region located above the door bottom region, a door top region located above the door window region, and a door window defined in the window region, wherein modifying the door includes:
• cutting the door through the door window region to divide the door into a door top section and a door bottom section;
• and thereafter
• joining a replacement door member, which is not the door top section, to the door bottom section to form a modified door, wherein the modified door has a modified door height from the door bottom end to the door top end that is less than the original door height.