41's have a different parking light socket orientation plus fender braces changed. 41 rear fenders are narrower and have different braces, bed has different number of boards. I've seen 1/2 ton pickups with 3/4 ton front fenders but curve at running boards not same contour. When I was restoring my 46, I'd picked up a few parts trucks, found all kinds of strange things mostly with War time built pickups. Probably would be a shorter list of parts that did not change between 41 & 46. That would be an interesting list.
