X-Frame Vin Decode - Impala Tech
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post #1 of 5 (permalink) Old 11-07-2014, 12:53 PM Thread Starter
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X-Frame Vin Decode

Anyone know why there is a vin code on a X-Frame, 1963 Impala 2 Door HT? How do you decode or is it even possible?
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post #2 of 5 (permalink) Old 11-07-2014, 02:16 PM
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Partial or hidden VIN's where only stamped upon cars that were frequently stolen (popular). Examples would be a 409 425 horse motor, or a 340 horsepower 327 small block. I don't know who decided what was popular: but I do know that all big blocks where stamped with partial VINs starting in 1963, while the rest of the rabble didn't get stamped with an anti-theft partial VIN until the federal government required it on all motors starting in 1967.

Big Dave
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post #3 of 5 (permalink) Old 11-08-2014, 09:13 AM Thread Starter
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Can this be decoded? Or is the decoding data available? My frame has a 6 digit number stamped into it.
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post #4 of 5 (permalink) Old 11-08-2014, 09:41 AM
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The VIN will tell you the year the car was made, whether it left the factory with a V8 or an L6 (but not which engine option), the assembly plant code and the six digits of the VIN that were sequential starting with 100,001. You already know the year and the sequence in that plant that produced it so the only unkown is whether it shipped from the factory with a V8 or a six. Look under the hood to determine that. If you find a much desired V8 (one that was factory rated at more than 300 horsepower) it will have the last six digits of the VIN stamped upon the engine's identification pad. If it doesn't then it will probably be a 235 six, or a 283, or a 327, or a 348, or a 409 as those where the engine options offered in 1963.

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post #5 of 5 (permalink) Old 11-09-2014, 11:07 AM
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msp177,

All full size X-frame Chevrolets had a partial VIN stamped on the frame in two places. They were stamped with a letter designating the assembly plant followed by the last 6 digits of the VIN. For example, if the VIN of the car was 31847B123456 then B123456 would be stamped on the frame and indicate it was the 23,456th full size Chevy built at the Baltimore plant.
This was done for theft protection, regardless of engine. Every plant produced a car with a sequence number of 123456, but having the plant designation in front if it made it unique to that car.

Verne
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