PY Online Forums - Bringing the Pontiac Hobby Together - Stamped number where the block casting number is

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oldman

08-19-2025 03:19 PM

Stamped number where the block casting number is

I am currently working on a Pontiac 400 RA IV engine. I am a little concerned about the casting number. It is stamped on the passenger side behind #8 cylinder. I've never seen the number stamped. I've only seen it cast into the block. Has anyone ever seen this? The engine is in the car so I can't look to see if it is 4 bolt mains.

oldman

08-19-2025 03:21 PM

1 Attachment(s)

I am posting a picture.

John Milner

08-19-2025 04:24 PM

This is normal for a Ram Air IV engine.

oldman

08-19-2025 04:56 PM

Thanks for the input. I was concerned. But it seems deceiving.

SD455DJ

08-20-2025 10:26 AM

1 Attachment(s)

Here's another '69 RAIV stamped block number...

Dennis

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