Not all OEM aircleaner assemblies for the 70Z had the notch in the snorkel seams. Here's a link to a good discussion on the subject:
http://nastyz28.com/threads/1970-z28-air-cleaner.64687/
Can you read the ink code on the inside of the base?...just cannot make it out clearly. I've never seen (yet) any ink markings on original bases. If it was an assembly line item , it should have the CU-code sticker on the outside perimeter for 1970...usually driver's side...or at least remnants of the sticker. Based on the photos, I'm thinking it may be an OTC item, but I'd have to compare some of the details to one of my originals.
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Steve Nuwer
1970 Z28, Norwood 03A, 48 48, 723 Int, M20, COO, 2021 Legends Platinum restored
1970 L78, Norwood 04C, 17 17, 711 Int, M21, COO, born-with drivetrain project.
1972 Z28, Norwood 11C project, born-with drivetrain, 26 26, 775, M20, CGG project
1970 Z28, Norwood 05C, 48 G, 720 Int, M21, COZ, Original Unrestored (SOLD)
www.2ndGenZ.com
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