IIRC, these will work. If I'm wrong, I'm sure Zane and Hobo will correct me.
They DO state: "Also fits 1941-42 4 cylinder 40 HP Commercial Truck (8 pair required)." That would be the truck version of the "N" engine, right? Split valve guide source
I see Dennis Carpenter has 'em, as well, and for less $$$. This post was edited by Bob at 20:54:46 06/16/13.