I also have an 8 foot bed and can drop the tailgate with room to spare. If there is any question in your mind, you could measure the distance by dropping a string with a weight on it at the fiver pin and mark that spot on the ground, then do the same thing at the fiver drop and measure the distance between those two marks. Then do the same thing on your truck from the center of the fifth wheel hitch and measure backward to your bumper and even drop the tailgate to see where it ends up. Even if you don?t have the hitch installed yet, you could basically do the same thing by using the approximate location of where the hitch goes. If it ends up looking like it?s going to me kinda close to whether it?s gonna work or not, you could then switch to mega-accurate mode on your measurements. ?