....just off of the top of my head my '75's two letters on the emission label are "AU".
Engine date code question
Team Owner
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From: Massillon,Ohio USA
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St. Jude Donor '08-'09-'10-'11-'12
Safety Car
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From: Indy Indiana
according to my black book, 13350 is a Feb 72 built VIN. Birthdate around feb 9th.. makes the trim tag stating 'C03' extremely suspect.. now a december built engine assembly 8 weeks prior becomes feasible ( 7 weeks prior if you count the usual Xmas 1 week shutdown.. did they do that back then?) but the '1' in front of the stamp would alert me to some deviation also.
looks so far like a real LT1 with AC but with a obviously wrong trim tag and a funky engine assembly stamp.
we could sure use photos of trim tag, engine stamp and block date code...
looks so far like a real LT1 with AC but with a obviously wrong trim tag and a funky engine assembly stamp.
we could sure use photos of trim tag, engine stamp and block date code...
Pro
Joined: Jun 2004
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From: No longer in Heaven
According to that VIN, the car was built in Feb '72, approximately the 9th of Feb. Better take a closer look at the trim tag.
Last edited by Ravine Speed; Feb 22, 2010 at 05:43 PM. Reason: mistake number
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Racer
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From: Medford NJ
Team Owner
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From: In limbo
St. Jude Donor '13-'15, '17 thru '22
I'm still waiting to hear back from the dealer on the block casting date and exact pad number. But in the meantime I found something else suspicious. The VIN number on this '72 LT1 is 513350 (13,350th made). According to the Black Book, this would put it's production in Feb.'72. BUT the trim code tag has CO3, which is Oct.3,1971. Therefore its VIN number should be about half of what it is. The block stamped VIN matches the VIN on the pillar post. So...what about the possiblity of someone placing that LT-1 engine (and possibly trans, which wasn't checked) with a matching VIN tag into a regular '72 Corvette body. Without being able to view the VIN stamped in the frame rails, I guess it's difficult to prove huh? Man, this thing is getting ugly.
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Racer
Joined: Jan 2010
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From: Medford NJ
Yep. I know. I'm waiting for the pics. What can I say... I forgot the camera at home!! 
Plus I had cataract surgery recently and can't see very good close up. 
I should have felt the numbers like braille and written them down. 
But hey, aren't these mysteries FUN!? 
Plus I had cataract surgery recently and can't see very good close up. I should have felt the numbers like braille and written them down. But hey, aren't these mysteries FUN!?
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The trim tag showing a G makes much more sense. The only unexplained feature is the extraneous 1 at the beginning of the engine machine code. Is it possible that the pad is a factory re-stamp and that the 1 is a leftover from the 1st stamp??
Safety Car
Joined: May 2006
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From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Check the other things
Besides the "L" in the VIN denoting the LT-1 engine, there are a number of 'one of' items for a true LT-1 car. If the car is really an LT-1 A/C car, (the VIN with the the L in it) will also have the lower RPM tach and a 3:55 rear end (the only one available with the A/C LT-1).
Also, if you lift the rear rug the fiberglass next to the three storage compartments will have "C 60" painted on the floor to inform the production people to seal the astro ventilation flaps under the rear window. A/C LT-1s were only produced between Jan 72 and Apr 72.
Also, if you lift the rear rug the fiberglass next to the three storage compartments will have "C 60" painted on the floor to inform the production people to seal the astro ventilation flaps under the rear window. A/C LT-1s were only produced between Jan 72 and Apr 72.
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Racer
Joined: Jan 2010
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From: Medford NJ
My error. The engine numbers located on the boss on the right side of the engine are V1213CKY there is nothing before the V.
The engine number is stamped 12S513350 – The code for that is 1 Chevrolet Division, 2 Model year 1972, S manufactured in St. Louis and the last six production sequence numbers (13,350).
The number in the rear of the block near the bell housing is LT010. The "T" could be a "1" and the last zero may or may not be accurate. It is very difficult to see. Can someone interpret this?
The trim plate is "G03" indicating that the engine was produced in February of 1972. The engine being produced on December 13 of 1971 and the car being manufactured in February is starting to make more sense especially if they stopped or reduced output between Christmas and New Year’s. If someone could make sense of that date code on the back of the block it might be the last clue to match the engine to the body. And that mark under the carpet is an excellent point. I'll try to check that out.
The engine number is stamped 12S513350 – The code for that is 1 Chevrolet Division, 2 Model year 1972, S manufactured in St. Louis and the last six production sequence numbers (13,350).
The number in the rear of the block near the bell housing is LT010. The "T" could be a "1" and the last zero may or may not be accurate. It is very difficult to see. Can someone interpret this?
The trim plate is "G03" indicating that the engine was produced in February of 1972. The engine being produced on December 13 of 1971 and the car being manufactured in February is starting to make more sense especially if they stopped or reduced output between Christmas and New Year’s. If someone could make sense of that date code on the back of the block it might be the last clue to match the engine to the body. And that mark under the carpet is an excellent point. I'll try to check that out.
Team Owner
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From: In limbo
St. Jude Donor '13-'15, '17 thru '22
My error. The engine numbers located on the boss on the right side of the engine are V1213CKY there is nothing before the V.
The engine number is stamped 12S513350 – The code for that is 1 Chevrolet Division, 2 Model year 1972, S manufactured in St. Louis and the last six production sequence numbers (13,350).
The number in the rear of the block near the bell housing is LT010. The "T" could be a "1" and the last zero may or may not be accurate. It is very difficult to see. Can someone interpret this?
The trim plate is "G03" indicating that the engine was produced in February of 1972. The engine being produced on December 13 of 1971 and the car being manufactured in February is starting to make more sense especially if they stopped or reduced output between Christmas and New Year’s. If someone could make sense of that date code on the back of the block it might be the last clue to match the engine to the body. And that mark under the carpet is an excellent point. I'll try to check that out.
The engine number is stamped 12S513350 – The code for that is 1 Chevrolet Division, 2 Model year 1972, S manufactured in St. Louis and the last six production sequence numbers (13,350).
The number in the rear of the block near the bell housing is LT010. The "T" could be a "1" and the last zero may or may not be accurate. It is very difficult to see. Can someone interpret this?
The trim plate is "G03" indicating that the engine was produced in February of 1972. The engine being produced on December 13 of 1971 and the car being manufactured in February is starting to make more sense especially if they stopped or reduced output between Christmas and New Year’s. If someone could make sense of that date code on the back of the block it might be the last clue to match the engine to the body. And that mark under the carpet is an excellent point. I'll try to check that out.
If that is true, and you have engine assembly of 12/13/71, and trim tag date of 2/3/72, then your dates are in the right order (casting before engine assembly, engine assembly before body build).
