Quote:
Originally Posted by PurelyGTO68
I expect body panels were stamped on a regular basis to keep up with demand for any given production year so the week date should precede the date on the cowl tag. The cowl tag has a code that identifies the week that Fisher Body began building the body shell and associated components. So for example....a 1969 model year car body that begins assembly in the first week of Dec 1968 should have body panels stamped anywhere in the 44-46 week range. Similarly a car that begins assembly on the 20th week would expect to have panels stamped several weeks earlier (17-19th weeks). Of course exceptions do exist so it helps to keep that in mind.
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It's model and plant specific but I find most of the time the sheet metal date stamps are very close to build dates.
All the sheet metal on my fathers GTO from Baltimore is within a week of it's production date. My 69 Z/28 is a Norwood 12D 68 build and every piece on the car is stamped 50 or 51 which is just a week prior or even a few days before the cars scheduled build date. My Formula is from Van Nuys and also very close.