I would LOVE to have that truck! I can't believe I missed it the first time I looked at the photo. How rad is it that someone took a stock stepside, flared the rear fenders, installed a dually rear end and upgraded the front axle as well? I may be mistaken, but I am almost positive that was not an option from the factory in 1955-57. It's so well done that it looks factory.
Great picture. Can't tell this far away, but these Chevys are either '64, '65 or '66's. Count 3 trucks from the back on the top row and notice that the white truck has the optional Big Back Glass.