Nice truck, but he sure did the stretch the hard way. It looks like it's stretched thru the doors. Way more complicated than just behind the doors.
Not sure a stretch is even needed. I was 6'3" and my dad was 6'2 back in the 60's when he had a '48 GMC 3/4 ton shop truck. We both did just fine driving it. Maybe girth counts as much as height. I'm just a bit thicker than I was back in my high school days.
(We'll see when I get my 3100 on the road)