1. The earlier deuces all had low-mounted lights, but the ones with winches tended to have a reduced field of vision due to the low lights and high bumper. So, over time the factory changed it to the wo/w trucks with lows and w/w highs, then everything had highs.
2. Hood grab handle is a field mod, and a very common one. Makes opening the hood just a little easier, but it's not that important.
3. Later trucks, about after 1970, came from the factory with the stone guard, some of the earlier trucks had the mod done to it later on. If your truck is 1960 or before, and you want a perfect resto, no stone guard. I wouldn't worry too much about it, odds are if you're driving a deuce you don't need to worry about traffic bunching up in FRONT of you to sling gravel in your radiator.
4. I've only seen the intake going in the top hole, some with a "air funnel", some without. I have never seen the air intake for the heater going in the lower hole, at least not in any of the 100+ trucks I have previewed.
5. If you have a winch truck, notch SHOULD be on top.
6. USMC clips were on front bumpers, but sometimes they were cut off if the truck went back into Army service from the USMC. If they were cut off, you'll see the "feet" of the paper clip still on the bumper, and the "loop" removed.
7. Front pintle hitch, I haven't seen any of the trucks come out of GL with this on, but I have seen a few guys here add them. They are very useful for hooking up to a trailer, and winching something onto it, if you have a w/w truck.
A couple other pics with front end mods you might like: