I carefully scrutinized the stamped number on this 2nd series 1955 235. The full stamped numbers are: 0327699 T255X. To reconfirm what was shown in the above pictures, the casting dated number is: E2155. Maybe more information will come to light now.
Al

smile Alan

1947 (early) GMC EC-302 Dump Truck
Jimmy
In the Stovebolt Gallery
More pix in Photobucket