"For what it is worth, these photos are from Jason Ayers 1100 mile survivor 70 Z28, automatic."
Thanks Rick. Comparing the 4490 carb markings to the 4555 markings, the front airhorn stamp matches the stamped List # and the secondary vacuum canister stamp is the same for both with either "7540" or "754D"....no sure if the last digit is alpha or numeric. I am guessing the stamp on the side of the airhorn could be a date or assembler #. But the six digit stamp on top of the fuel bowls has me baffled.
The 4555 carb referenced has an 021 (1st week of Feb 1970) date stamp on the airhorn. The 4490 carb has an earlier 012 (2nd week of Jan, 1970) date stamp.
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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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