C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

[C2] L72 pad

Thread Tools
 
Search this Thread
 
Old 05-03-2023, 11:27 AM
  #21  
tuxnharley
Race Director
Support Corvetteforum!
 
tuxnharley's Avatar
 
Member Since: Aug 2004
Location: NorCal
Posts: 13,978
Received 1,941 Likes on 1,187 Posts

Default

Originally Posted by Factoid
Here’s mine, but I don’t have any 3’s.


????? I seem to see a 3 there - 6113146 ?
Old 05-03-2023, 02:01 PM
  #22  
dcare
5th Gear
Thread Starter
 
dcare's Avatar
 
Member Since: Apr 2023
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
Default

@Vet65te trying to find that roadster with the production rounded 3 stamp, can not find....
Old 05-03-2023, 02:56 PM
  #23  
Vet65te
Le Mans Master
 
Vet65te's Avatar
 
Member Since: Jan 2007
Location: Prescott Arizona
Posts: 5,289
Received 1,039 Likes on 674 Posts

Default

It's shown in the first post of that "L72 Thread' I mentioned. C2 1966 L72 count - CorvetteForum - Chevrolet Corvette Forum Discussion
There's a '3' also shown on Post #81 and Post #85 but...those threes are in the VIN, not the Date Code Stamping.
Mike T - Prescott AZ
Old 05-03-2023, 03:06 PM
  #24  
Factoid
Le Mans Master

 
Factoid's Avatar
 
Member Since: Jul 2018
Location: San Antonio, TX/Mahopac, NY
Posts: 8,418
Received 5,600 Likes on 2,816 Posts
2024 Corvette of the Year Finalist - Modified
2024 Corvette of the Year Finalist - Unmodified
2023 C7 of the Year Winner - Modified
Default

Originally Posted by tuxnharley
????? I seem to see a 3 there - 6113146 ?
I meant in the plant/date/configuration stamp.
Old 05-03-2023, 10:55 PM
  #25  
67:72
1967 Pedal Car Champion
Support Corvetteforum!
 
67:72's Avatar
 
Member Since: Mar 2020
Location: US-PNW
Posts: 4,961
Received 2,012 Likes on 1,359 Posts
Default

Originally Posted by tuxnharley
????? I seem to see a 3 there - 6113146 ?
The 3 needs to be in the engine stamp and not the VIN. The reason being that the two stamps were done at two different manufacturing facilities at different times with different tooling; the stamps' characteristics are not comparable. The 3 also needs to be in that place value position on that date, though the engine code can be different. This lends high probability that the same gang holder and stamps were used so that character shape and characteristics can be compared.

In other words, find another Tonawanda block assembled on Nov. 3rd, 1966 and you will have definitive proof one way or the other as to the 3's shape.
Old 05-04-2023, 08:23 AM
  #26  
joewill
Safety Car
 
joewill's Avatar
 
Member Since: Sep 2007
Location: Indy Indiana
Posts: 4,220
Received 263 Likes on 210 Posts

Default

Originally Posted by 67:72
The 3 needs to be in the engine stamp and not the VIN. The reason being that the two stamps were done at two different manufacturing facilities at different times with different tooling; the stamps' characteristics are not comparable. The 3 also needs to be in that place value position on that date, though the engine code can be different. This lends high probability that the same gang holder and stamps were used so that character shape and characteristics can be compared.

In other words, find another Tonawanda block assembled on Nov. 3rd, 1966 and you will have definitive proof one way or the other as to the 3's shape.
You are presuming that that Tonawanda block stamped Nov 3, 1966, is NOT a re-stamp, which it might be.. you have to compare absolute proven factory stamp block A to Block B.. and you don't know which block is block A or Block B.
Old 05-04-2023, 09:16 AM
  #27  
67:72
1967 Pedal Car Champion
Support Corvetteforum!
 
67:72's Avatar
 
Member Since: Mar 2020
Location: US-PNW
Posts: 4,961
Received 2,012 Likes on 1,359 Posts
Default

Originally Posted by joewill
You are presuming that that Tonawanda block stamped Nov 3, 1966, is NOT a re-stamp, which it might be.. you have to compare absolute proven factory stamp block A to Block B.. and you don't know which block is block A or Block B.
Actually my presumption is that the second block is not a re-stamp. But yes, you need more examples of 11/3/66 stamps to see which shape 3 was used on that date. If two flat-topped threes are found, then the round is likely a re-stamp; if two round top threes are found then this one is likely true. But then it also becomes a matter of comparing the T11 characters too.
Old 05-04-2023, 01:16 PM
  #28  
427 Sidepipes
Racer
 
427 Sidepipes's Avatar
 
Member Since: Jun 2009
Location: MA
Posts: 462
Received 247 Likes on 137 Posts

Default

I do NOT have another 1966 Tonawanda BB assembly stamp for T1103IP, but went thru many 66 Big Block ONLY images looking for the '3' character.
All together, I found eighty-two (82) instances of the '3s' with the FLAT TOP... while there wasn't a singular '3' with the ROUND TOP, on an original date stamp.
Nothing conclusive, as each day, the assembly date stamp is unique... and they likely differ, even between IL and IP engines.
The following users liked this post:
Rumblegutz (05-04-2023)
Old 05-04-2023, 01:42 PM
  #29  
Thorson
Drifting
 
Thorson's Avatar
 
Member Since: Dec 2009
Location: Grande Prairie
Posts: 1,838
Received 44 Likes on 19 Posts
C2 of the Year Finalist - Modified 2020
C2 of Year Finalist (appearance mods) 2019

Default

Originally Posted by c2performance
Sorry it was from 2 years ago. I have the complete packet from him. I don't want to start a pissing match here. If it wasn't so much I would have had it done. I will use Roy S. instead.
I had my L78 pad affirmed by CCAS this past October. Price was $1,500.00
It’s a fraction of that if he can’t affirm the pad though, can’t find the paperwork but I think it’s around $50 to $100.
Old 05-04-2023, 04:39 PM
  #30  
KingRat
Drifting
 
KingRat's Avatar
 
Member Since: Jan 2002
Posts: 1,781
Received 868 Likes on 421 Posts

Default

Originally Posted by bluestreak63
But at the end of the day, you are still going to be second guessing.

So when you sell it, are you going to say matching numbers, like the guy you bought it from? But if you have no documentation or certification, can you honestly say that?

I guess it’s on the buyer to do the due diligence.
You can honestly say it is "numbers matching". Original factory installed is something different.
Old 05-04-2023, 04:43 PM
  #31  
KingRat
Drifting
 
KingRat's Avatar
 
Member Since: Jan 2002
Posts: 1,781
Received 868 Likes on 421 Posts

Default

Originally Posted by 67:72
The 3 needs to be in the engine stamp and not the VIN. The reason being that the two stamps were done at two different manufacturing facilities at different times with different tooling; the stamps' characteristics are not comparable. The 3 also needs to be in that place value position on that date, though the engine code can be different. This lends high probability that the same gang holder and stamps were used so that character shape and characteristics can be compared.

In other words, find another Tonawanda block assembled on Nov. 3rd, 1966 and you will have definitive proof one way or the other as to the 3's shape.
*November 3rd, 1965.


The following users liked this post:
67:72 (05-04-2023)
Old 05-04-2023, 05:06 PM
  #32  
KingRat
Drifting
 
KingRat's Avatar
 
Member Since: Jan 2002
Posts: 1,781
Received 868 Likes on 421 Posts

Default

I do not have a lot of '66 stamps in my photo collection. I do have a few hundred '67 stamps. I know its kind of an apples and oranges situation since its not the same model year however, here is a sampling from early, mid, and late '67 production.









Old 05-09-2023, 07:54 PM
  #33  
Paster
Instructor
 
Paster's Avatar
 
Member Since: Jul 2002
Location: Placerville CA
Posts: 225
Received 60 Likes on 43 Posts

Default

I'm not a stamp pad expert by any means, and I cannot comment on the 3. But, I do notice in the OP's image, the top and bottom horizontal bars in the date code's "I" (for the number 1) have longer bars than every other example in this thread. In fact, every other example posted here appears to be consistent.
The following users liked this post:
Tiros (05-10-2023)



Quick Reply: [C2] L72 pad



All times are GMT -4. The time now is 10:48 AM.