Air cleaner ID, Please
 

I will not ask the community for their help until I have exhausted all the research I can do on my own. But I have not been able to find another air cleaner exactly like this one. It is very close to a '64 GTO, except for the hole for? Maybe crankcase breather? The base looks like it is for a Rochester 4GC or WCFB. So I put it in your hands to get an answer. Thank You and Merry Christmas.:youguysrock::youguysrock:

I'd be inclined to start looking for pictures of California 1963 Buick Skylark air cleaners.

that square shaped hole in the side looks to be for an AC FB59 crankcase breather filter element.

Apparently, I am told, there are some with the hose with snorkel pointed toward the right and others without the hose with the snorkel pointing left. Not sure why 2 types. Thanks goes out to a Knowledgable member for his sharp eyes and showing me a picture.

----Possibly 1964 low horse 409, but that still wouldn't explain that hole as that would seem to make it later,,,,,,,Bill S

I thought the same thing Bill but the snorkel is different:

https://i.postimg.cc/mkd6nGJN/hh.jpg

looks like a 64 gto air cleaner

----Ah, Lee and Spooky! You got it right down to the "FRONT". Circa 64 GTO. I think I can tell because of the forward location (on the front fender) of the remote control mirror. It went on the drivers door in 65

Thanks a lot guys! Looks like there were 2 types used in 64. One with a hose in the side of the housing & one without.
I wonder why? What the difference is? Emissions? Different HP? Oh well, if anyone needs a near mint air cleaner for their GTO? I have one. Anyone care to throw out a fair value?