Yea if its 2X4 lift spindles are the way to go. But...i dunno about that "you can't tell a difference", it is definately a world better with gap guards, but its still pretty obvious unless you cram some big tires in there
i cud post a pic of 2 trucks side by side one with a 3" bl and one with a 6" sus and you cud not tell the difference , other than u knowin the trucks and the differecne
and the back of the truck will always have the beautiful gap between the bumper and the reciever hitch