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Engine Block Stamp Code Help

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Old Aug 31, 2025 | 07:26 PM
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Default Engine Block Stamp Code Help

Hello Everyone, it has been a hot minute since I have posted.


Had some spare time so I unwrapped the 69 from under the tarps and fought through cobwebs to investigate the stamp code.

Having a hard time finding a good decoder ring for it.

Any thoughts? Stamping Code: 19D047675
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Old Aug 31, 2025 | 07:48 PM
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Definitely not the original engine.

Look at the rear “shelf” for the casting number and date.
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Old Aug 31, 2025 | 07:57 PM
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Originally Posted by 69L88
Definitely not the original engine.

Look at the rear “shelf” for the casting number and date.
I can't get to the casting number very well.
It was sold as not being original. Just looking to double confirm I guess.The second owner told me the engine is an 1970 (or was it 1971/1972?) LT1.
The car itself is a base 300HP car.
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Old Aug 31, 2025 | 08:06 PM
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Originally Posted by 69stingray
Hello Everyone, it has been a hot minute since I have posted.


Had some spare time so I unwrapped the 69 from under the tarps and fought through cobwebs to investigate the stamp code.

Having a hard time finding a good decoder ring for it.

Any thoughts? Stamping Code: 19D047675

Tried to take a photo of the rest of the stamping. Looks like. V021__FC


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Old Aug 31, 2025 | 08:20 PM
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Could this be a 327 from 1969?


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Old Sep 1, 2025 | 09:01 AM
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All 69 Corvette small blocks were 350s.

Your snip is from the NastyZ/28 website. The B and F in the right column indicates the FC code was installed in B-body and F-body cars so the engine is a 327 and came from a Biscayne/Belair/Impala/Caprice or Camaro.

Last edited by 69L88; Sep 2, 2025 at 07:30 AM.
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Old Sep 1, 2025 | 09:52 AM
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If the suffix code is "FC", which it appears to be it's a 327/235 with a 2bbl and a Turbohydro 350 out of a 1969 mid size Chevrolet (Chevelle and Malibu) built at Doraville GA. The "D" in the third position in the VIN number (19D047675) identifies the final assembly plant of the car the engine was originally installed in as Doraville GA, where I think they were building both GM A and B Bodies in 69.
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Old Sep 1, 2025 | 05:23 PM
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[QUOTE=69L88;1609067256]All 69 Corvette small blocks were 350s with a 3970010 block casting.

There were 3 different small block cast numbers used in 69
3932386 early
3956618 mid
3970010 later
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Old Sep 1, 2025 | 05:31 PM
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Thanks, everyone.

It appears the block might be a 327 — very interesting. The second owner replaced the engine, but why they would swap a 350 for a 327? Who knows. It's highly modified, so I wonder if a 3.48" crank was installed.

Currently, it has a Weiand single-plane intake, "186" casting heads, and a monster TRW TP112N cam.
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Old Sep 1, 2025 | 07:18 PM
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Originally Posted by 69stingray
Thanks, everyone.

It appears the block might be a 327 — very interesting. The second owner replaced the engine, but why they would swap a 350 for a 327? Who knows. It's highly modified, so I wonder if a 3.48" crank was installed.

Currently, it has a Weiand single-plane intake, "186" casting heads, and a monster TRW TP112N cam.
Engines get replaced for all kinds of reasons. The previous owner may have already had the 327, it might have been the only thing he could afford at the time, you never know. Years ago I found a 62 Bel Air 509 sitting in a field. The owner pulled the '09 in 73 or 74 during the gas crisis and replaced it with a 2bbl 283, fortunately he kept the 409. A friend of mine just came across a 69 convertible that was originally a 427/435, but has a 69 396/375 out of a Nova in it now. People do strange things all the time.
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Old Sep 2, 2025 | 12:38 AM
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The 186 heads could have come from a 300 hp 69 350 if they have 1.94" intake valves. If they have 2.02" intakes then they could be from a 69 350/350. In both these cases, the rocker studs were pressed in. If the heads have original screwed rocker studs and push rod guide plates, then they'd most likely be from a 70 LT-1.
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Old Sep 15, 2025 | 07:38 PM
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Originally Posted by C3Cliff
The 186 heads could have come from a 300 hp 69 350 if they have 1.94" intake valves. If they have 2.02" intakes then they could be from a 69 350/350. In both these cases, the rocker studs were pressed in. If the heads have original screwed rocker studs and push rod guide plates, then they'd most likely be from a 70 LT-1.
Thanks C3 Cliff, something to look for. Not sure the size of the values.
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