Mine fits in better backwards. And it’s into a 97 F350 ECLB with a lift and 37” tires. First few times seemed scary once you get her lined up it’s not a big deal. I’ve an aluminum custom combo drybox fuel cell that takes up 24” back of the cab. So with tailgate down it just fits in. I made straps to support the tailgate cables, bolted top end of strap where box latch pin used to be (in top of box). Then took latch pin itself and bolted it on the other end of the steel flat bar (strap) and latched that into the open tailgate, stock latch spot. Simple works great. I also took 3/4” pressure treated plywood and added angle iron on the sides to disperse the weight, slide it into the bottom of box with tailgate open, so it covers the tailgate and bottom of box.
Typically in all my pickup boxes I have tiedowns mounted in the corners and put plate on opposite side of the box so tie downs will not pull through the box. To tie mine in I hook a ratchet strap into the top A arm over the front wheel then down to floor, same on passenger side. Rears I do somewhats similarity, over the tire. Meaning not onto the frame. Reason I say this as I travel on rough roads at times and hooked to the frame (in the past), machine suspension compresses from hit and Ratchet strap falls off. By hooking over the tires the UTVs suspension can still flex and move, tires are planted and air pressure in the tire keeps a more constant pressure on strap. Do they come loose, sometimes but not nearly as often. Last thing is I have a 4x4 pressure treated posts box width against my dry box 2 high for my rear wheels to press against. Folding ramps fit under machine.
Logged many Kms with this system works for me, no pranged box, UTV, tailgate.
Sorry for such a long winded post....yeesh.
j