Houston, I havw this trim on an old parts truck, front fenders only, This truck also has the stainless(?) window trim. The truck does not have a box and is what I would call a3/4 ton. This trim is-has been on this truck a long time and I would venture to say if it was not factory it was installed by the dealer.
The trim would have to be installed to fit the curvature of the fender as far as horizontal measurements go, but there would be some leeway vertical. I have this truck in storage not near by but this week end I will be there and take some pistures for you.
Do you have some of those "spears"? how did you come about them? ben