well there is lost's of great pic on this site freddy
www.camex.ca if you look at the bottum of this page
http://www.camex.ca/new-equipment/bed-trucks.html there are some PDF with info on them a small truck would be about 270" bed all the way up to 400" i would say your truck should be closer to the 400" can't weght to see what you come up with love your bilds