You're using bad logic.
Why can't you shoot two bullets from a gun? You can shoot one bullet and its safe.
Why cant you stick a fork in a power outlet? You can stick a gumwrapper in and not get shocked.
It's not worth explaining in depth, since you don't understand the large difference between 3 and 5 inches of body lift. There's not enough room, but maybe if your body lift pucks were 5 inches wide it'd be sortof safe. And then you're going to have a GIGANTIC gap between your bed and your frame. And your frame is going to be immensely visible. plus your bumpers will be super low and to remount them you'll have to make super weak brackets.
Also, your steering shaft will have to be lengthened..a lot.
Anyways, what do you need a 5 inch body lift for? I have 35 inch tires and a 3 inch body lift...
easily more than enough height