CRG Discussion Forum
Camaro Research Group Discussion => Decoding/Numbers => Topic started by: LeadFoot_69_Z/28 on October 04, 2006, 12:02:25 AM
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I have a 1969 Z/28 with a build date of April, 3rd week, 1969.
I have a 4053 dated 924 (8 weeks previous) and 941 (2 weeks previous).
Is the 941 the perfect date for an April, 3rd week, 1969 Z/28? I have read that 3 - 6 weeks is the best. Is 2 weeks previous (941) too early?
Please look at these 4519 and 5583 metering blocks (below). See how the castings are different in each picture?
(http://i84.photobucket.com/albums/k5/LeadFoot_Z28/924_blocks_2_txt.jpg)
(http://i84.photobucket.com/albums/k5/LeadFoot_Z28/941_blocks_2_txt.jpg)
Which one is correct? Why are they different if they both are stamped 4519 and 5583?
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I'd guess that's just a Holley casting mark anomaly, Lead. Holley made a blue million metering blocks! I'd think the important thing woiuld be the DZ on the choke horn. Can they actually trace the metering blocks to a specific carburetor?
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Go with the closer one. Remember that was the build date of the body, car was completed several days later.
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The "circles" are ejector pin pads, where slides pushed on the casting to eject it from the die-cast mold; they have no functional effect at all.
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My 10B, Oct '68, build date Z has a caburetor mfg date of 872; a lot closer to 8 weeks than 2.
Jimmy V
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I would think that the early cars would have carbs spaced out futrther than the later cars just because of ramping up production.