air cleaner base needed

Lets sort this out. The normal 65 a.c. (single snorkle) has a 4" afb hole on a base about 16" across with a filter base of about 13". Where does 8 -9 ' come from as a dim? the 67 full size car with a Holley 5" hole still has similar dims 16" across and 13" filter base. The unsilenced base is still the 13" size.

Clarify what you are doing and perhaps some one with the set up will come forward.
Hmmmmm. I thought the air filter housing I took off a junkyard 65 300L was stock. Maybe it isn't.
Well, let me try to explain it this way........ it looks identical to the stock one from a 69 340, only difference is that it's only 11" in diameter. It has no snorkel, and has one hose nipple for the crank case vent. It is identical in every way to the 340 filter housing, but smaller.
Does that help any?
Thanks for the info by the way!

George