Author Topic: DZ stamp opinion  (Read 6530 times)

jeff400w

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DZ stamp opinion
« on: September 24, 2023, 11:09:26 PM »
Has anyone seen a DZ stamp like this?  I know it looks like a bad restamp, but I have owned this block since
1975. I knew the 2 previous owners of the car. To the best of my knowledge the motor had never been apart before
my friend,the previous owner spun a bearing and pulled it in 1973. It sat for a couple years before I got the short  block. You can see I had the blocked decked but made sure the stamping pad wasnít touched.
Having an explanation on this makes a big difference on the value of this block.

william

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Re: DZ stamp opinion
« Reply #1 on: September 25, 2023, 02:53:24 AM »
It does not match up with other early September 1968 stamps.
Learning more and more about less and less...

KurtS

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Re: DZ stamp opinion
« Reply #2 on: September 30, 2023, 05:06:54 AM »
I looked at your pad before (fb?). I don't believe it's an original stamp.
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Delco115

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Re: DZ stamp opinion
« Reply #3 on: September 30, 2023, 11:56:31 AM »
Just throwing this out there..... Is it possible the "Z" character could have been loaded upside down in the gang stamp holder, allowing it to be misaligned with the rest of the stamping?

I haven't seen an empty gang stamp holder in some time and am not real familiar with how the individual number/letter stamps are secured in it. Does anyone have detailed pictures of one and how it was loaded prior to its use?

bcmiller

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Re: DZ stamp opinion
« Reply #4 on: September 30, 2023, 12:28:41 PM »
Has anyone seen a DZ stamp like this?  I know it looks like a bad restamp, but I have owned this block since
1975. I knew the 2 previous owners of the car. To the best of my knowledge the motor had never been apart before
my friend,the previous owner spun a bearing and pulled it in 1973. It sat for a couple years before I got the short  block. You can see I had the blocked decked but made sure the stamping pad wasnít touched.
Having an explanation on this makes a big difference on the value of this block.

Take a clear high resolution pic of the whole pad after you clean it off with lacquer thinner on a rag. Then send to me full size.
« Last Edit: September 30, 2023, 01:20:26 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

william

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Re: DZ stamp opinion
« Reply #5 on: September 30, 2023, 12:34:11 PM »
The Z character isn't the problem.

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bcmiller

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Re: DZ stamp opinion
« Reply #6 on: September 30, 2023, 01:19:55 PM »
Agreed.

I still want to see the full pad. You can send to me if you want.

Engines were definitely being restamped in the 80s, and probably some in the 70s.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

boomer632

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Re: DZ stamp opinion
« Reply #7 on: September 30, 2023, 02:17:03 PM »
This is one of them
06A 711 57 57 X66 L78 M22 BU

jeff400w

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Re: DZ stamp opinion
« Reply #8 on: October 03, 2023, 01:59:42 AM »
bcmiller , Iíll clean up the pad and see if I can get a better picture.

bcmiller

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Re: DZ stamp opinion
« Reply #9 on: October 03, 2023, 02:14:12 AM »
bcmiller , Iíll clean up the pad and see if I can get a better picture.

Sounds good.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

firstgenaddict

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Re: DZ stamp opinion
« Reply #10 on: October 03, 2023, 02:58:30 PM »
Is that a 386 block?
I don't have a problem with a GRIND OUT and gang stamped over the grind out - it's the errant skewed Z which is difficult to explain.

James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
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bcmiller

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Re: DZ stamp opinion
« Reply #11 on: October 03, 2023, 04:19:46 PM »
Is that a 386 block?
I don't have a problem with a GRIND OUT and gang stamped over the grind out - it's the errant skewed Z which is difficult to explain.

From his original post.

You can see I had the blocked decked but made sure the stamping pad wasnít touched.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

firstgenaddict

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Re: DZ stamp opinion
« Reply #12 on: October 03, 2023, 08:49:10 PM »
I can see the marks on the pad from being ground out with a rotary abrasive wheel.

They run approx in the direction of intake to exhaust

There are NUMEROUS examples of these (grindouts using a rotary tool and either hand or gang stamped) on low mileage never apart Corvettes.

The problem here is because it was decked there are no broach marks ANYWHERE, which makes the whole thing MORE QUESTIONABLE.
If I were writing a report for a customer. I would state that the pad has no broach marks visible and does not represent the typical characteristics of Assembly line deck stamps. I may indicate the appearance of a grind out, however with also being decked determining exactly what has happened very unlikely and would not be able to make a determination whether or not the engine was a DZ from the factory. 
James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

jeff400w

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Re: DZ stamp opinion
« Reply #13 on: October 04, 2023, 02:08:05 AM »
Here is hopefully a betting picture. As I have looked more closely at this stamp it does appear that the stamp had been ground off and restamped. If  you look closely under the 4 and the D you can see a DZ.
Yes it is a 386 block Cast H 28 8

bcmiller

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Re: DZ stamp opinion
« Reply #14 on: October 04, 2023, 02:12:29 AM »
Does look like a grind out. Will let others chime in.

I could be wrong, but I am leaning one direction.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

 

anything