[yossarian19]

I don't know if anyone has said it yet, but you'd have a hard time riveting horns onto anything. They'd have to be attached by some other means to a thin piece of sheet metal, then rivet that to the hood.
No sir, don't think i'd attach horns that way. I'd bind them end to end with a piece of leather wrapping the ends and sinew or leather around that, then lashing them to the grill.
Alternately, bailing wire around some small "l" brackets which were riveted to the hood.

Sorry about the caps lock - my toddler absolutely insists that it remain on (he's sitting next to me) and i'd rather annoy you all than pick a fight with a two year old.