What engine does this 1974 Corvette have according to the notes?

The engine stamping suffix 'CWR' decodes to a 454 with 270 HP and automatic transmission (A.T.), with casting number 3999289 confirming a 454 block.

Is the engine numbers-matching?

Yes — the note states the engine stamping is original and that the '121128' stamped on the engine matches (mates to) the car's VIN, 1Z67Z4S421128.

What do the casting date and casting number codes mean?

'B 28 74' is the casting date, decoded as February 28, 1974, and '3999289' is the casting number, identifying the block as a 454.

What are the interior and paint codes on this Corvette?

Code 415 = Saddle vinyl interior; code 68L = Dark Brown Metallic paint.

What is the car's build date and mileage?

Body code 'H-8' decodes to a March 8th build date, and the car showed 9,584 miles when the note was written on 4-23-05.

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1974 Corvette Convertible 454 Numbers-Matching Verification Notes - VIN & Codes

Handwritten 1974 Corvette spec note with VIN, engine and build codes

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Handwritten data sheet recording a 1974 Corvette's VIN, engine, casting date, paint and build-date codes.

AI caption November 2008 · Photo 2221 of 4575

This is a handwritten inspection/verification note dated April 23, 2005, documenting the identifying numbers of a 1974 Chevrolet Corvette convertible showing 9,584 miles. The note records the VIN (1Z67Z4S421128) and confirms the engine stamping is original. Decoded details include: the engine suffix code 'CWR' identifying the 454 cubic-inch V8 rated at 270 HP with automatic transmission; the partial VIN '121128' stamped on the engine matching the car's VIN (a numbers-matching engine); the block casting date code 'B 28 74' translating to February 28, 1974; and casting number 3999289 confirming a 454 block. Trim and paint codes are also decoded: 415 indicates a Saddle vinyl interior and 68L indicates Dark Brown Metallic paint. Finally, the body build date code 'H-8' is decoded as a March 8th build date. A reader can learn from this document how a specific 1974 Corvette convertible was authenticated as numbers-matching, including its engine, casting date, casting number, interior, paint color, and build date. This appears to be one page of a multi-page set of documentation photos.

This document covers 1974, which may differ from this 1991 Ford LTD Crown Victoria.

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Frequently asked questions

What engine does this 1974 Corvette have according to the notes?: The engine stamping suffix 'CWR' decodes to a 454 with 270 HP and automatic transmission (A.T.), with casting number 3999289 confirming a 454 block.
Is the engine numbers-matching?: Yes — the note states the engine stamping is original and that the '121128' stamped on the engine matches (mates to) the car's VIN, 1Z67Z4S421128.
What do the casting date and casting number codes mean?: 'B 28 74' is the casting date, decoded as February 28, 1974, and '3999289' is the casting number, identifying the block as a 454.
What are the interior and paint codes on this Corvette?: Code 415 = Saddle vinyl interior; code 68L = Dark Brown Metallic paint.
What is the car's build date and mileage?: Body code 'H-8' decodes to a March 8th build date, and the car showed 9,584 miles when the note was written on 4-23-05.