Looking at the original set of pictures.....
Harry is right........ the one with the decal is a larger size that would accommodate the Fram AC 146....... the middle one is what I have on my C15a and is the smaller bowl..... also the same on other 40 and 42 civilian chev trucks..... the left one recently sand blasted is the HD with the factory modified deeper bowl..... shown in a 1947 Chev truck manual..... no part number. The top lid of the larger air cleaner and the HD cleaner are probably interchangeable at 9 inches......
Hollander's interchange book does not list air cleaners.
????????
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Bob Carriere....B.T.B
C15a Cab 11
Hammond, Ontario
Canada
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