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Old Oct 23, 2012 | 08:39 PM
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Default 71 engine code

Hello i am new to this sight i just bought a 71 corvette with a original 454 i hope can anybody tell me what the block numbers mean passenger rear L29 70 front passenger T012ICPJ and C11S108345 drivers side rear 3963512 thanks bo sanders
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Old Oct 23, 2012 | 08:57 PM
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From: Warren MI
Default Engine Codes

Here is a link for the Engine Codes and explanation.

CPJ 454 365 Auto 8.5:1 4.25 in 4.0 in 4 v Roch

11S108345 is the sequence code the numbers after the S should be the last digits of your VIN.

3963512 is the Block casting number.
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Old Oct 23, 2012 | 08:58 PM
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Default Engine Codes

Sorry I missed the link.

http://www.71corvette.com/engine.html
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Old Oct 24, 2012 | 10:17 AM
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Originally Posted by Bo sanders
...T012ICPJ...
Tonawanda, New York engine assembly plant. All Corvette big blocks were assembed at Tonawanda.

012I January 21st

CPJ Corvette code for 454 365hp with automatic transmission

...C11S108345...
C Chevrolet
1 Corvette
1 model year (1971)
1 car line series code (all 71s have this 1)
08345 consecutive unit number. The 8345th 1971 Corvette assembled.

Last January built car was #8230; last February build car was #10886. Your car probably passed the station on the assembly line where the trim tag was attached on Monday or Tuesday, February 1st or 2nd, 1971.

What is the time/build code in the upper right corner of the trim tag? My guess is G01 or G02.

Engine code and assembly date and the VIN derivitive appear to be correct for your car.


Last edited by Easy Mike; Oct 24, 2012 at 10:21 AM.
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