1 Repair the cracked bezels with black MarineTex. JBWeld on steroids. Just a little at a time, and use a Dremel and sandpaper to shape it. The MarineTex will fill the gaps and add strength. Then, you can use a little Bondo or glazing putty to mint them out. Prime and paint.
2 While I do not know anything about that grille, and H4 is an H4 so you should be able to splice on the connectors you need. I agree that you should wire the headlights thru relays.
3. Use the regular old Jeep external hood latches. You don't need anything else IF you have good-quality ones and they are installed properly.
4 Your Jeep looks fantastic with that camo paint job and it will look even better with the Israeli grill.