[cheng-gong]

There is a hole in the front of it, by front I meanthe part facing the front of the car, at the very top. What is its purpose? I know its not for the fuel hose where you actually pump gas in the car, I cant fiqure out its purpose?

 

[wulffrith]

It is a valve release, in 66 mustangs they needed a way of releasing pressure.

 

[giyn21]

Maybe the car has rust

 

[luther]

Maybe a vent plug