vacuum relay dating

Mike E.

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Join Date: February 28, 1975

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#1

vacuum relay dating

February 17, 2022, 09:53 PM

I am working on a 25k-mile 71. When dealing with the headlight door vacuum relay, I ran across this. The car is a March 22 build.
Maybe others of you have seen this before, but I had not. I would perceive that to be a February 20, 71 ink stamping.
vacuum relay headlights (1).jpg
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David B.

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Join Date: March 1, 1980

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#2

February 18, 2022, 08:28 AM

Re: vacuum relay dating

The Chevrolet production ID manual shows you are correct. 51st day etc.
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James G.

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Join Date: August 22, 2018

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#3

February 21, 2022, 10:48 AM

Re: vacuum relay dating

I have seen dates on the metal plate which the valves mount to first time on the side of the valve...

James A Groome
1971 LT1 11130 - https://photos.app.goo.gl/zSoFz24JMPXw5Ffi9 - the black LT1
1971 LT1 21783 - 3 STAR Preservation.- https://photos.app.goo.gl/wMRDJgmyDyAwc9Nh8 - Brandshatch Green LT1
My first gen Camaro research http://www.camaros.org/forum/index.p...owposts;u=4337
Posts on Yenko boards... https://www.yenko.net/forum/search.php?searchid=826453
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