Anyone able to or have already measured the rear cargo space in a mega cab with the seats folded down into "flat floor"? My wife is wanting to put our dogs in crash rated kennels as we travel, have a few options to go with but really wanted to get a better idea of width and length of the back seat space in a mega cab. Google gives me back a few different not the same answers over the years so figured best to check real world. Looking at order a 25 3500, not sure if all the 4.5th gen Rams would be the same or not. Thanks!