Author Topic: need the experts help with stamp pad  (Read 2964 times)

daves87gn

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need the experts help with stamp pad
« on: April 15, 2014, 12:06:44 AM »
gonna post in the orphans but just want to confirm stamp is good first,

stamp pad V0425DZ
block cast 3956618
cast date C109
all he can get off the vin is 19n64384, hes gonna try and get the missing number with better light
Dave, SoCal
1969 Camaro z/28 (x77) Cortez Silver, endura front bumper, deluxe black interior,Rosewood dash with no tach or console, m22, BV 4:10 rear

z28z11

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Re: need the experts help with stamp pad
« Reply #1 on: April 15, 2014, 01:23:20 AM »
One thing that sticks out is the fact the block has been decked - the lines you see running across the pad are feed lines from the milling cutter's carbide inserts. Pretty distinctive, they differ from the factory decking in that the lines from the factory broaching process run the length of the block, not sideways across the deck. They are also more indistinct than milling lines.

If it's a restamp (which it appears to be), the stamp is pretty decent. The stamp indentations are usually pretty shallow, so a .010 - .015" pass usually removes them. It could be original, but it would have had to have been stamped pretty deep to remain that visible -

My opinion - other agree or dissent ?
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

Mike S

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Re: need the experts help with stamp pad
« Reply #2 on: April 15, 2014, 01:43:06 PM »
  I can't comment on the correctness of this stamping but I wanted to say you can have a block decked and still retain the stampings providing the decking process doesn't take too much off vs. the depth of the stamp.Most original stampings will have a very-very slight ridge along the characters edge from the metal displacement of the imprint force. Any decking, providing it doesn't take the stamping totally off, will usually even out the slightly raised edge (as this photo looks) depending on the deck cut depth.

Mike
67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

daves87gn

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Re: need the experts help with stamp pad
« Reply #3 on: April 15, 2014, 06:00:59 PM »
I emailed the pics to Kurt, and he also informed me that the block has been decked but that stamp was good

waiting on owner to see if he can get the missing digit for the vin, then i'll post in the orphans section


Dave, SoCal
1969 Camaro z/28 (x77) Cortez Silver, endura front bumper, deluxe black interior,Rosewood dash with no tach or console, m22, BV 4:10 rear

x77-69z28

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Re: need the experts help with stamp pad
« Reply #4 on: April 15, 2014, 07:11:37 PM »
I would say the missing digit is "3". Which would make it 634384. Strikes me as odd that the block sat around for six weeks before being assembled. Mine is less than a week.
69 x77 burnished brown, 711 int 05A bought in 78
67 rs/ss 350 butternut yellow 4 speed 2nd owner
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
11 cts-v blk diamond  edition wagon 556hp sick!

BULLITT65

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Re: need the experts help with stamp pad
« Reply #5 on: April 15, 2014, 11:29:36 PM »
did you extrapolate that based on stamp date?
1969 garnet red Z/28 46k mile unrestored X77
Looking for 3192477 (front) spiral shocks 3192851 (rear) please
Looking for an original LOF soft ray windshield
Looking for original Delco side post negative battery cable part # 6297651AV

VINCE Z28

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Re: need the experts help with stamp pad
« Reply #6 on: April 16, 2014, 12:53:20 AM »
Guys if you ever need your motor decked make the machinist stops before it gets to the stamp pad. I had a 396 decked and I told him under NO circumstance was the stamp pad to be touched. To his credit he stopped it before the pad.
" He who knows naught, knows not that he knows naught"  It's not you...  It's just the way my brain is wired.

BULLITT65

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Re: need the experts help with stamp pad
« Reply #7 on: April 16, 2014, 01:03:45 AM »
Lucky you I had the same instructions to my machinist, he botched it .... it got somewhat fixed but was preventable
1969 garnet red Z/28 46k mile unrestored X77
Looking for 3192477 (front) spiral shocks 3192851 (rear) please
Looking for an original LOF soft ray windshield
Looking for original Delco side post negative battery cable part # 6297651AV

daves87gn

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Re: need the experts help with stamp pad
« Reply #8 on: April 16, 2014, 02:01:27 AM »
sorry, not my block, found it for sale at reasonable price and might buy, unless we can reunite with car
Dave, SoCal
1969 Camaro z/28 (x77) Cortez Silver, endura front bumper, deluxe black interior,Rosewood dash with no tach or console, m22, BV 4:10 rear

69Z28-RS

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Re: need the experts help with stamp pad
« Reply #9 on: April 16, 2014, 02:13:19 AM »
Lucky you I had the same instructions to my machinist, he botched it .... it got somewhat fixed but was preventable

When I rebuilt my Z28 engine (in 1976), I was very afraid to leave the block at the machine shop.. they wanted  to do a 'clean up' cut across the deck...  The machinist told me they would stop before they hit the pad, but I put a piece of duct tape across the pad, and wrote "DO NOT REMOVE" on it...  :)   fortunately they didn't machine the pad.. :)    I hear so many unfortunate stories, that I actually HATE to leave any of my 'stuff' anywhere with anyone. :) .. the 'I'm sorry's' don't undo their damage...
Gary W / 09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe, '70 Mach I 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

Mark

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Re: need the experts help with stamp pad
« Reply #10 on: April 16, 2014, 02:20:18 AM »
did you extrapolate that based on stamp date?

Stamp date would make that an 05A built car, and the VIN would be after 19N64XXXX.  Missing number is probably the last digit.
Mark C.
1969 Indy Pace Car
350/300HP RPO Z11

paceme

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Re: need the experts help with stamp pad
« Reply #11 on: April 16, 2014, 03:20:04 PM »
Lucky you I had the same instructions to my machinist, he botched it .... it got somewhat fixed but was preventable

When I rebuilt my Z28 engine (in 1976), I was very afraid to leave the block at the machine shop.. they wanted  to do a 'clean up' cut across the deck...  The machinist told me they would stop before they hit the pad, but I put a piece of duct tape across the pad, and wrote "DO NOT REMOVE" on it...  :)   fortunately they didn't machine the pad.. :)    I hear so many unfortunate stories, that I actually HATE to leave any of my 'stuff' anywhere with anyone. :) .. the 'I'm sorry's' don't undo their damage...

I was also very nervous about having machine work done on my orig Z engine (which happens to be the same date as Gary's)So I had called Jeff my engiene builder to remind him to NOT deck the block because it would remove the assembly stamping which ties the block to the car. He started to laugh and said you’ll always be able to identify this block as yours because SHAUGER is stamped under the timing cover. I never recall Radar @ K & G Speed (who did machine work for me in 1978) stamping my name.
Steve Shauger
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x77-69z28

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Re: need the experts help with stamp pad
« Reply #12 on: April 16, 2014, 04:40:34 PM »
did you extrapolate that based on stamp date?
yes, and by my car. My car is 05A, and my vin is 639xxx. My block is also an 010 block. The way they were cranking out camaros, I doubt a block would sit around for six weeks before being built. As I said, my casting date to assembly date is less than a week.
69 x77 burnished brown, 711 int 05A bought in 78
67 rs/ss 350 butternut yellow 4 speed 2nd owner
70 Z28 forrest green, green int, M40, bk vinyl roof PROJECT
99 SS hugger orange 6spd NO TTOPS bought new 1 of 54
11 cts-v blk diamond  edition wagon 556hp sick!

BULLITT65

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Re: need the experts help with stamp pad
« Reply #13 on: April 16, 2014, 06:06:04 PM »

"I was also very nervous about having machine work done on my orig Z engine (which happens to be the same date as Gary's)So I had called Jeff my engiene builder to remind him to NOT deck the block because it would remove the assembly stamping which ties the block to the car. He started to laugh and said you’ll always be able to identify this block as yours because SHAUGER is stamped under the timing cover. I never recall Radar @ K & G Speed (who did machine work for me in 1978) stamping my name. "
[/quote]

Yes but your name stamped on the block does diddly to hold any value if they machine the number off of the pad.... :D
1969 garnet red Z/28 46k mile unrestored X77
Looking for 3192477 (front) spiral shocks 3192851 (rear) please
Looking for an original LOF soft ray windshield
Looking for original Delco side post negative battery cable part # 6297651AV

z28z11

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Re: need the experts help with stamp pad
« Reply #14 on: April 17, 2014, 01:23:46 AM »
  I can't comment on the correctness of this stamping but I wanted to say you can have a block decked and still retain the stampings providing the decking process doesn't take too much off vs. the depth of the stamp.Most original stampings will have a very-very slight ridge along the characters edge from the metal displacement of the imprint force. Any decking, providing it doesn't take the stamping totally off, will usually even out the slightly raised edge (as this photo looks) depending on the deck cut depth.

Mike

Look closely at the edges of the stamp, and you get the suggestion the feed lines actually roll downward into the lines of the stamp - to me, that indicates the stamping happened after the decking took place. The stamps should be sharp faced, which tends to not deform the material as much as standard character stamps do. Still, not saying this is definitively the case here, it only suggests it. If the block was decked only a few thousands, the stampings might survive intact, but in most cases it will lighten it up considerably (if not completely lift it).
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06