Stamping on shock towers - Vintage Mustang Forums
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post #1 of 11 (permalink) Old 06-11-2019, 07:46 AM Thread Starter
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Stamping on shock towers

Can anyone tell me what the stampings on the shock towers normally match and should them match each other? It doesn't seem to match anything within the VIN. Cheers

-Warren
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post #2 of 11 (permalink) Old 06-11-2019, 07:58 AM
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Just stamping from the plant / date / shift codes. They're all over the car in the original metal just often covered by other metal, seam sealer, paint, 50 years worth of dirt, oil, grease.

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post #3 of 11 (permalink) Old 06-11-2019, 08:00 AM
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I think they're just the date and maybe the plant and shift when that particular part was made. You'll notice that a lot of the steel is stamped with codes like that if you go looking.

There's some info on decoding a lot of the date stamps here: Ford Date Decoding id and I'm sure you can find plenty of other sites out there too with more info.

So nothing to do with the VIN (AFAIK) just a little info on that particular piece of stamped steel.
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post #4 of 11 (permalink) Old 06-11-2019, 08:03 AM
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You will actually find these type of stampings all over the car. They are date codes as to when the item was made. Some are month day shift, some are year month day.

For example, an intake manifold, where it could span many years of use, might be 5C07, made the 5th year, March (A = January, etc.) and the 7th day. In your case, it is 10 21 3, October 21, third shift. Those items typically have a short production life (for example, a fender was only good for 1965 1966 models) so the stamping is a tracking in case they have a bad batch, etc.

Should they match: No, but they were close. A car might have 10 21 3 for one side, and 10 26 1 on the other, meaning they were stamped 5 days apart, and it was just how batches fed into the production line. What you do not have is a car that was built 10 15 having a 10 10 1 (good) and a 12 06 2 (December 6th, 2nd shift) Not good. This would indicate that part was replaced sometime in it's life.

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post #5 of 11 (permalink) Old 06-11-2019, 08:04 AM Thread Starter
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Thanks both of you for the quick reply. As I'm cleaning the 52 years of crud away from the engine bay I'm finding other stampings but these were the clearest out of the bunch. I'll check out that site thanks Magnus.
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post #6 of 11 (permalink) Old 06-11-2019, 08:19 AM Thread Starter
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Should they match: No, but they were close. A car might have 10 21 3 for one side, and 10 26 1 on the other, meaning they were stamped 5 days apart, and it was just how batches fed into the production line. What you do not have is a car that was built 10 15 having a 10 10 1 (good) and a 12 06 2 (December 6th, 2nd shift) Not good. This would indicate that part was replaced sometime in it's life.
So my car was stamped 17M (Dec 17 1966), my Manti report has it actually built 27 Dec. I have one shock tower stamped 21 Oct and the other 9 Dec (no shift?), is Oct to end of Dec too far apart for it to be an original part?
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post #7 of 11 (permalink) Old 06-11-2019, 09:50 AM
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Its probably original but look at how the part is attached. Spot welds are good. Arc welding beads not so much.

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post #8 of 11 (permalink) Old 06-11-2019, 07:15 PM
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you have a Marti Report from 66?? What year is your car?? Just asking
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post #9 of 11 (permalink) Old 06-11-2019, 08:02 PM
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Quote:
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you have a Marti Report from 66?? What year is your car?? Just asking
December '66 would be a '67 model year car...
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post #10 of 11 (permalink) Old 06-13-2019, 06:47 AM Thread Starter
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Correct, '67 Fastback.
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post #11 of 11 (permalink) Old 06-13-2019, 05:41 PM
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Correct, '67 Fastback.
ok the 67 part now makes sense.
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