IMO, the angled sides render the bottom of the toolbox useless for me, and the 61 1/2 width does stick over the sides some. A 60 width is perfect. DeeZee makes a toolbox that fits better, you can usually pick it up at tractor supply for $99, when they put them on sale.Been watching for deal after seeing this on someone's 900 here at PRC. Shop Kobalt 61-1/2-in x 12-in x 13-in Silver Aluminum Mid-Size Truck Tool Box at Lowe's
That is the one I installed on my unit. Price has gone up a little.It's not a deezee but here's the TSC link. Was in there this morning, Sign says sale ends today.
Tractor Supply Co. Narrow Midsize Single Lid Crossover Truck Box - Tractor Supply Co.