M38/m38a1 Wheel Id ?

I like the tall skinny look of the early original Jeep tire. So more and more I've gotten confused about wheels.
Trying to get a handle on M38/M38A1 military Jeep wheels is difficult at best (let alone all the other Jeep wheels!). Do only military wheels (all 16"?) have weep holes (that little tiny hole beside a lug hole)? Correct me, but I've noticed that maintaining a 12 o'clock alignment of the valve stem hole puts the weep hole of a 16" x 4 1/2" at 3 o'clock. And the weep hole of a 16" x 5" is at 9 o'clock. While the top lug hole on the 16 x 4 1/2" lines up with 12 o'clock, but, it's the bottom lug hole on the 16" x 5" that lines up with 12 o'clock. In addition the backspace on the 16 x 4 1/2" is about 3 1/4" while the backspace on the 16 x 5" is about 3 3/4". I'm not sure about other wheels, my research is limited and maybe I've only learned enough to be dangerous, but the backspace got me a bit confused as well. I'm wondering if the shorter backspace on the 4 1/2" (setting the tire/rim farther from the brake drum and frame) would allow a tighter turn radius (without rubbing? or no issue?), than the deeper backspace on the 5" (which would move the rim/tire closer to the frame?) ?? Why such a difference in backspace (does it truly create a noticeable difference?)?? And of course if the mere presence of a weep hole would allow a quick visually accurate clue of a wheel's exact measurements, that would be handy. I think I've correctly learned that the accurate measurement of a wheel's diameter and width is always inside the rim? I've also heard that the military wheels are a stronger, higher grade ?? I'm hoping somebody out there has knowledge and a bunch of photos and measurements to add to (or correct?) this thread. Thanks

 

I covered a lot of this info just the other day.
Please go read: WTB: 16x4.5 rims/wheels

Then if you have further questions I’ll be glad to specify of clarify anything more that I am able.