Block matching number mystery
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
3932386 IS THE BLOCK CASTING NUMBER which is for a 350 300 &350 HP engine.
Chevy engine blocks all had casting numbers from the foundry,
The other numbers indicate casting date and shift.
Casting month A = Jan, L = December, the heads also have part numbers as well as casting dates.
Almost all items on the car have "part / casting" numbers and date codes.
The NCRS books, restoration guides can give you the numbers.
Casting date looks like Sept 16, 68. = I 16 8
Chevy engine blocks all had casting numbers from the foundry,
The other numbers indicate casting date and shift.
Casting month A = Jan, L = December, the heads also have part numbers as well as casting dates.
Almost all items on the car have "part / casting" numbers and date codes.
The NCRS books, restoration guides can give you the numbers.
Casting date looks like Sept 16, 68. = I 16 8
Thread Starter
Safety Car
Joined: Jun 2004
Posts: 4,023
Likes: 1,181
From: La Mesa CA
So in summary
The block was cast on September 16, 1968 (I 16 8)
The block was used for 1969 model year 350 ci 350 hp engine (3922386)
The engine was built in Flint (V)
The engine was built in early October 1968 (1007)
The engine was built for a 1969, 350 hp engine, 4 speed, with air conditioning (HX)
The engine was installed in the car during October of 1968 (00582)
The car was built in late October of 1968
The numbers on the pad look factory correct.
The mystery is the pad surface under the serial numbers
It is known that the factory would grind out and restamp pads
What a great education
Thanks everyone.
Glenn in San Diego
The block was cast on September 16, 1968 (I 16 8)
The block was used for 1969 model year 350 ci 350 hp engine (3922386)
The engine was built in Flint (V)
The engine was built in early October 1968 (1007)
The engine was built for a 1969, 350 hp engine, 4 speed, with air conditioning (HX)
The engine was installed in the car during October of 1968 (00582)
The car was built in late October of 1968
The numbers on the pad look factory correct.
The mystery is the pad surface under the serial numbers
It is known that the factory would grind out and restamp pads
What a great education
Thanks everyone.
Glenn in San Diego
Safety Car
Joined: May 2008
Posts: 3,755
Likes: 722
From: Lafayette Louisiana
Always fun to learn about Corvettes!
Always fun to learn about Corvettes, origins, history, ect.
I think you would enjoy getting the 68/69
NCRS manual for your year
http://cdn.zip-corvette.com/media/ca...-/b-704_13.jpg
and
also
https://prodimage.images-bn.com/pima...4_s550x406.jpg
I learned a lot from these books and even more on this forum, Thanks!
I think you would enjoy getting the 68/69
NCRS manual for your year
http://cdn.zip-corvette.com/media/ca...-/b-704_13.jpg
and
also
https://prodimage.images-bn.com/pima...4_s550x406.jpg
I learned a lot from these books and even more on this forum, Thanks!
Last edited by 20mercury; Nov 19, 2017 at 11:59 PM.
Race Director
Joined: Oct 2008
Posts: 19,275
Likes: 1,681
From: Long Island
ONE THING I SHOULD HAVE MENTIONED : not all dates started in January, and with some parts the dates skipped I and O + various other letters.
The NCRS guide is a big help as are MOST restoration guides.
As an example the PONTIAC historic society just admitted that a number of early 68 Firebirds had an engine vin that was off by one number due to a defective engine making it to the assembly line and not getting installed.
My friends father worked at a few assembly lines for GM and said they were cars - if you ran out you took parts from other lines and finished the days production run... funny when you think about todays processes.
The NCRS guide is a big help as are MOST restoration guides.
As an example the PONTIAC historic society just admitted that a number of early 68 Firebirds had an engine vin that was off by one number due to a defective engine making it to the assembly line and not getting installed.
My friends father worked at a few assembly lines for GM and said they were cars - if you ran out you took parts from other lines and finished the days production run... funny when you think about todays processes.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
ONE THING I SHOULD HAVE MENTIONED : not all dates started in January, and with some parts the dates skipped I and O + various other letters.
The NCRS guide is a big help as are MOST restoration guides.
As an example the PONTIAC historic society just admitted that a number of early 68 Firebirds had an engine vin that was off by one number due to a defective engine making it to the assembly line and not getting installed.
My friends father worked at a few assembly lines for GM and said they were cars - if you ran out you took parts from other lines and finished the days production run... funny when you think about todays processes.
The NCRS guide is a big help as are MOST restoration guides.
As an example the PONTIAC historic society just admitted that a number of early 68 Firebirds had an engine vin that was off by one number due to a defective engine making it to the assembly line and not getting installed.
My friends father worked at a few assembly lines for GM and said they were cars - if you ran out you took parts from other lines and finished the days production run... funny when you think about todays processes.
I is skipped on many casting dates. looks too similar to 1
