I use to make a 3 piont.the one down tube went to the pass side footwell from about the middle of the hoop.the problem with a 4 pt is that the down tubes to be leagal need to be from up high on the hoop so you either go thru the window or can not use the door.As for size it is based on wieght of vehicle so figure on that truck you might get away with a 1.75 .120 wall tube but more than likely a 2.00 tube.Stan