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524 block casting

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Old Dec 22, 2020 | 09:56 AM
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Default 524 block casting

Is this a 55 or 56 Chevy or corvette engine stamp on a 524 block casting date H225
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Old Dec 22, 2020 | 10:13 AM
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That's a '55 engine block.
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Old Dec 22, 2020 | 10:21 AM
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It's a Tonawanda block designated in the stamp by "T55F" A Flint block would be F55F

I'm sure if you look at the block, you'll find both embossed and debossed "T" markings on it.
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Old Dec 22, 2020 | 12:14 PM
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Default 55

Originally Posted by Chuck Gongloff
It's a Tonawanda block designated in the stamp by "T55F" A Flint block would be F55F

I'm sure if you look at the block, you'll find both embossed and debossed "T" markings on it.
were 55 Corvette blocks Flint only or Flint and Tonawanda
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Old Dec 22, 2020 | 01:33 PM
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Originally Posted by Mailbu Beach
were 55 Corvette blocks Flint only or Flint and Tonawanda
Flint only.
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Old Dec 23, 2020 | 08:58 AM
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Default 55

Originally Posted by Chuck Gongloff
Flint only.
I need to verify but am told the block casting date is H225

if that is correct.. wouldn’t it be a Flint block based on the one digit year casting
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Old Dec 23, 2020 | 09:30 AM
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Originally Posted by Mailbu Beach
I need to verify but am told the block casting date is H225

if that is correct.. wouldn’t it be a Flint block based on the one digit year casting
Yes, a single digit year in the date would indicate the block was a Flint casting.

However, the "T" in the pad stamping indicates the engine was assembled at Tonawanda.
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Old Dec 24, 2020 | 09:35 AM
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Default 55

Originally Posted by jim lockwood
Yes, a single digit year in the date would indicate the block was a Flint casting.

However, the "T" in the pad stamping indicates the engine was assembled at Tonawanda.
begs the question. Are there any known original 55’s with T stamped engine pads.

Did Tonawanda assemble both Flint and Tonawanda cast blocks?
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Old Dec 24, 2020 | 09:57 AM
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I 've owned a 524 block with a tonowanda stamp pad and yet a single digit for the year it was cast. it was out of an early 55 pass car. mike
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Old Dec 24, 2020 | 10:20 AM
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Originally Posted by Mailbu Beach
were 55 Corvette blocks Flint only or Flint and Tonawanda
Flint
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