Definitely the opening needs some radius work on the bottom, also need to build in some attach points for the 'glass bumper. The top has to drop enough to hide a cross brace needed between the fenders, and a place to build in the hinges, too...
Thinking similar on the tube grille, just smaller...Tubes will be 3/16" or 1/4" with the vertical bracing done in black so it disappears....