[poncho-mike]

Many years ago, I parted out a 74 GTO 4-spd car. It was a running driving car until high winds brought a tree limb carshing down on the roof. I pulled the shaker assembly off and put it in the basement. Over the years, I parted a lot of second gen T/As and various cars with 4-barrel and double snorkel air cleaners. I have several stacks of air cleaners in the basement, and the 74 GTO shaker top got separated from the shaker base.

So how can I identify a 74 GTO shaker base from a 73 and newer second generation T/A air cleaner base, or from any 73 and up 4-barrel air cleaner base. I know on Firebirds the surface the air cleaner sits on is dropped relative to the carb. Is the 74 GTO base have the same dropped surface? I know there is at least on 74 Grand Am 4-barrel air cleaner in the stack along with a bunch of Firebird bases. Pictures would be appreciated.