Methods, apparatus and kits for converting a flatbed truck body into a dropside truck body, are described. According to one embodiment, the apparatus comprises modified strap hinges used in combination with securement means and panels. The methods comprise securing within stake pockets formed within the load bed of flatbed truck body one strap of the modified strap hinge, with the opposed strap secured to side panels and rear panels. The panels are then secured, one to the other and to the headboard of the flatbed, using releasable latches. The truck body, so modified, facilitates loading and unloading, as, for example, by forklift, accommodates oversized loads, and provides an accessible work surface for tradesmen. The conversion is quick, easy and inexpensive to implement making dropside trucks available to consumers who might not otherwise be in a position to acquire one.