What are these??

[Son of Marty]

Those hole are supposed to be drains for that cavity and were left open.

[Mike Self]

1 hour ago, redrumm3 said:

I can't tell how large the plugs are but the could also fit the rear inner wheel well holes near the shock... 

Odd thing about those holes:  on roundies they were plugged with translucent plastic plugs identical to those used in the inner rocker panels inside the passenger compartment (under the carpet).  On squarelights those holes are left open.  

 

Dunno the factory's reasoning--save a few pfennigs per car, or to allow that void to dry out.  The effect was to allow lots of dirt to accumulate in that area, leading to more rust...but those plugs are quite a bit larger than the rubber plugs originally pictured.

 

mike 

[redrumm3]

5 minutes ago, Mike Self said:

Odd thing about those holes:  on roundies they were plugged with translucent plastic plugs identical to those used in the inner rocker panels inside the passenger compartment (under the carpet).  On squarelights those holes are left open.  

 

They were closed on my former '72 but are open on the '76 I now own.

 

 

 

[Son of Marty]

I didn't know they were plugged on roundies ether way the area is a rust trap, imagine how much water is flying around there in a rain storm.