I stumbled onto the link for this YouTube video on another plowing site. From the description:
Walter plow opening road in upstate NY after the St. Valentines Day Storm of 2007. When you see the snow come over the center of the "V", it's 6' deep at that point. The truck is a 1971 Walter with a Frink V and 14' wings. 300HP Cummins & Allison Automatic.
1971 Walter N Plowing