Here are some more Einar, first the side trim picture, then a couple out of focus, that try to show both, the upper and lower captive nuts for the grill mounting screws. These are 5 x .8 thread four sided nuts, held in three sided boxes so they can move around to center the grill but not turn. Then a picture of the screws, 5 x .8 x 25 mm, the top a blued flat head, the bottom a chrome oval head. I hope these will help you get the nose back on with less guess work!
Yes my wheel arches are rolled on wire, english style, or as Ferrari does it. As I have only seen one other factory example like this, I felt Terry Rushbrook's measurements would be more accurate for the majority of these cars. My car also features lighter gauge sheet metal from the cowl forward than in the rest of the car. The other car with rolled on wire wheel arches also had the thinner front end body work. I saw this other car in New York, about 40 years ago. It was painted a light straw yellow.