The ornamental design for a carbody, as shown and described.
FIG. 1 is a right side elevational view of a car body showing my new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a rear perspective view thereof; and,
FIG. 7 is a front perspective view thereof.
The portions of the car body shown in broken lines form no part of the claimed design. The shading lines shown in the drawings represent the approximate three-dimensional contour of the design, and are not intended to indicate surface decoration.