I wonder why 1/2 ton trucks kept getting bigger with each new design. The 37 is just shoulder to shoulder, the 46 leaves a little gap, the AD's can actually have a middle person but you can lean across the seat to roll up the window. By 72 three people had plenty of room and four is okay if everyone uses deodorant, but they are still rated at 1/2 ton. We have a 48 and a 63 in the shop and after working under the dash of the 48 the 63 seems like you could string a net across the middle and play tennis inside. One of the guys has a Colorado with the five cylinder engine that is a pooch but gets in the 20's on gas mileage. I wonder how that engine would do in a smaller lighter truck if one kept all the electronics and maybe dropped it down out of the wind a bit. See how these gas prices warps one's train of thought.