C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Mar 25, 2018 | 03:38 PM
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Front pad right side of engine: TT217CGV

Head casting # 336781
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Old Mar 25, 2018 | 04:00 PM
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Hi 72P,
Not sure what if anything you're asking?

The suffix code... CGV... Indicates a 1970, 454 c.i./345 h.p., engine, built with a 4 barrel carburetor, for use with a manual transmission, in a passenger (full size) car.
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Alan
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Old Mar 25, 2018 | 06:35 PM
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Thanks Alan 71.

The block casting number is 3963512. The seller say 70 Chevelle engine. I'm thinking of buying it to rebuild an put in my 72 vert it is a big block car but the original motor is long gone.
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Old Mar 26, 2018 | 07:07 AM
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Hi 72,
It appears a 512 block would have been the basis for the 454 engine used in your 72 if it was a bb car.

The stamp:
Are you sure about the second T?
Might it be a 1 or an I used as a 1?
Typically:
T... Tonawanda
01 through 12... the month the engine was assembled
01 through 31... the day the engine was assembled.
3 letters... Broadcast Code

Regards,
Alan

Here's an example of the configuration for a bb stamp. (68-69 engines used a 2 letter broadcast code). Note the 2nd character. It's a 1.... so November 29 for the assembly date of this engine.

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