What a great find, Nick! So much detail captured in the grains of silver.
I have see one other photo with this type of simple, sheet metal plow over the stubby pilot with wooden slats:
https://digital.denverlibrary.org/digital/collection/p15330coll22/id/42172/rec/73Since number 8 spent most of her career on Clear Creek with number 7, the snow in the canon likely didn't require the heavy plows. I'll bet that number 7 in your photo had a "Como" spark arrestor as well, dating it to about 1916-1918.
Can anyone date the auto at the left frame??
Jim Courtney
Poulsbo, WA