Missing bolt?

[WendyB73Mach1]

Hi everyone. I’m just changing my fuel filter and noticed a spot where it looks like a bolt should go. Should there be a bolt here and if so, can you give me guidance on the size that I need?

 

[MAD IRISHMAN]

My guess would be some sort of accessory attachment point. No need to put a bolt in it at this point I would think. Perhaps some more seasoned aficionados on here may know more.

 

[Stanglover]

Could it be an unused mount point for air conditioning compressor?
If it's NOT a 'through' hole, don't worry about it.

 

[Sheriff41]

Earlier intake manifold castings had this bolt hole also. In 1970, the Mustangs equipped with ram air used this bolt hole for the Shaker air cleaner support bracket.