Josh - May be difficult. The edges of the softwash system are designed to overlap the bed of a pickup and "cradle" into it. That part is adjustable (up and down) to allow for a custom fit. It may be able to adjust all the way up and fit over the cabinets but that means the back (tailgate) would also be raised up high since its all one piece. I'm just thinking of a "reading" tailgate which are usually small amd cabinets that extend much higher from the bed than the tailgate does. This will create a water tight integrity issue since the whole skid is designed to sit on the edges of a truck bed and use the tailgate as a water tight lock to protect the pumps from weathering. Given that a normal pickup bed should be level all the way across the top.

Just my thoughts but its aluminum so you can always trim it to custom fit.