Buyers Products 18x16x90 Aluminum Top Mount Truck Box with Flip-Up Door Model 1701365 Double Lid however this is our workaround

however this is our workaround for Ford's modification (See pictures 6-7 or call for help)

Fits: All full-size diesel pickups

Equipped With Toolbox L-Rail That Permits Quick Installation

Highway Products 1200 Pound Aluminum Bed Slide For Mid Size 6' Beds Model # 4312-104

Buyers Products 18x16x90 Aluminum Top Mount Truck Box with Flip-Up Door Model 1701365 Double Lid however this is our workaroundBuyers Products 18x16x90 Aluminum Top Mount Truck Box with Flip Up Door 1701365 We recommend the 1701365 Buyers Top Mount for commercial use. Buyers Products is one of our most popular brands in toolboxes. Their commercial equipment heritage is evident in this very well designed American made Buyers Topsider Toolbox. Buyers Products Diamond Tread Aluminum Topsider Truck Box with Flip Up Door gives you a convenient and secure way to store your tools.