The Service Body Headache Racks are manufactured in three heights-15″, 17″, and 19″- and fit most most utility/service bodies with side loading tool boxes. These are not designed to fit bodies with “flip top”-top opening-tool box lids.
The three different heights are designed to locate the bottom of the 2 x 2 square tube cross member to clear the third brake light. To order the correct headache rack for your body, measure from the top of the tool box to just above the third brake light. The bottom of the 2 x 2 rectangular tube cross members are 15″, 17″, and 19″ above the tool box.
The 3 x 2 x 3/16 angle that mounts across the tool boxes is 76″ long. It will fit most service bodies with either single or dual rear wheels based on the 76″ angle iron length.