Holes behind rear license plate

[CudaMoparRay]

I never noticed these on my other 'Cudas (Holes behind rear license plate) but my new '72 has them also, so I plugged them up as they would let water or worse gasoline into the trunk area.
I posted  a picture of another 'Cuda for sale that also has them and they don't look covered.
I'm sure there is a reason for them but I do not know 
Thanks 

[YellowThumper]

 

[anlauto]

Not factory whatsoever...likely misguided rust proofing holes....

[YellowThumper]

Not factory whatsoever...likely misguided rust proofing holes....

With that stated, I wonder if they were for air shock valves. One for each side.

[7E-Bodies]

Highly likely. The last barracuda I worked on had them in the valance.

[CudaMoparRay]

Not factory whatsoever...likely misguided rust proofing holes....

With that stated, I wonder if they were for air shock valves. One for each side.

I don't know too much about air shock valves but the ones I've seen if put there would block the license plate from going up to fill the gas tank unless they were very low profile ones? 

[CudaMoparRay]

Not factory whatsoever...likely misguided rust proofing holes....

Building on that, could it be something somewhat common that would be done on a "Rotisserie" restoration?   

[CudaMoparRay]

At-any-rate all the answers given so far are plausible.
Now that it seems not to be a common thing or at least not factory my next step is to ask the prior owner if he knows why they are there.

[anlauto]

Does the car have rust proofing holes in the door jambs or doors ?

[CudaMoparRay]

Does the car have rust proofing holes in the door jambs or doors ?

Are these they? 

[1 Wild R/T]

Does the car have rust proofing holes in the door jambs or doors ?

Are these they? 

Some of those holes are for rustproofing whether itt was Ziebart or another company who knows... interesting fact, the holes for a convertible door wedge are drilled...
And overall very nice detail of the door jamb..

[anlauto]

Yes those are rust proofing holes in the door jambs leading me to believe that some drill the tail panel at the same time thinking they were drilling into an area otherwise inaccessible.

[CudaMoparRay]

Spoke to the prior owner (a Ford guy) and he said he never noticed them.
He probably thought they were a Mopar thing 

Thanks to you all    for solving the mystery of the "rust proofing holes" which I guess is a good thing overall for me and the car.
I will now proceed to plug them all up to make sure nothing gets in there.