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Engine casting Number

Old Aug 27, 2023 | 11:46 AM
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Default Engine casting Number

Hello all;
Can anyone identify this engine number from a small block chevy rear casting? "3956643"
I don"t have any other information right now.
Checked Lime Book / Pontaic etc. but no luck so far.
Thanks.
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Old Aug 27, 2023 | 11:50 AM
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3956618 perhaps? It's possible to mistake a 1 and 4, and a 3 and 8.

Seeing a photo of the casting number can help us figure it out
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Old Aug 27, 2023 | 11:51 AM
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Small Block Chevy Engine Block casting and code identification (nastyz28.com)

from this list I believe you read the casting number wrong. which can be easy to do as sometimes the casting number is not real clear
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Old Aug 28, 2023 | 10:08 AM
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Thank you guys.
I will try to get a better look and picture as well.
Appreciate your responses.
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