Flat Bottom Cowl Induction air cleaner differences

[John Brown]

I've had a few or these original flat bottomed air cleaners and have come up with some observations on them. How can you tell the difference in the bottoms when they are not with the car they came on? Here's part of the solution. This first picture is of a a-c from a 427 Yenko Camaro.

[John Brown]

Same Yenko 427 a-c.

[John Brown]

This one came off of a SS350 car.

[John Brown]

This one came off of a different SS350 Camaro.

[John Brown]

Just a couple more.

[John Brown]

Last one.

[John Brown]

All of the black air cleaners I pictured I know exact what they came off of. The first two pictures were definitely off of a 1969 Yenko Camaro with a 427. The next two pictures are of air cleaners off of two different 69 SS 350 Camaros. The last two pictures of the silver a-c were on e-bay and I have no info to prove what they were off of, but by the shape of the vent tube, I'm gonna bet they may have come off of a 396/427 car or off of a Z-28, but not off of a 350 car. The 350 a-c's shows the vent tubes having a full 90 degree bend. The black 427 a-c shows it having less than a 90 degree bend. I don't have an original flat bottom Z28 air cleaner in hand to look at, but if you do, maybe you can draw some more conclusions from it by checking the shape of the vent tube too. I just wanted to share my pictures because this is one of the reasons I frequent this site. I've learned a lot from everyone on here and wanted to share a little knowledge.

[William]

Are both vent tubes the same diameter?

[John Brown]

Same diameter on all of the vent tubes. I've had all of the black air cleaners in my hands along with all the hardware that went on top of the 350 air cleaners too.

[William]

Is the distance from the bottom surface to the carb mounting surface the same on both?