I have this simpler one in my Ford:
https://www.tuffyproducts.com/produc...-cab-2009-2014
I do not think they had the longer ones when I bought mine. With mine it is secured by the hold downs for the factory jack. If you are willing to stash the jack elsewhere there is a lotta room in it (specs say 31"). My problem is there are many times when I want to use it there is a dog on top of it, but that is not a Tuffy problem...
I had one of these in my 1991 Suburban (last of the square body) between the Corbeau seats, and it was really nice to have that much lockable space:
https://www.tuffyproducts.com/produc...-ii-12-12-wide
The current truck is a 2014 F-150 with the middle section of "bench" seat and I plan to pull out that seat that has been used twice in six years and get another one.