i recently picked up a late 314, serial # 222xxx (1983), it has a mesh grill in it but is missing the frame that the mesh would have fit in. Did any of the 314's ever have a mesh grill? I suspect it's wrong.
As far as I know, and don't hold me to this, but I'm pretty sure all of the 300 series tractors had open grilles with vertically mounted bars and a top center mounted medallion with the two-legged deer. I don't think there was any mesh in the grille at all. Can you post a picture of what you have so that we can see what you have to be sure?