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66 corvette 427

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Old Feb 4, 2023 | 12:53 PM
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Default 66 corvette 427

Hi guys, I recently acquired a 427 from a elderly customer. Her late husband was building the engine to race. I ran the block numers and it seems to be a 66 corvette 4 bolt main 427. Was planning on keeping to engine but now thinking of selling. Kind of a mystery motor, has the steel high performance heads, aluminum rods, unknown crank and pistons. Cam is in but no gear or chain. Seems to be a high compression motor. Was wondering if anyone could tell me the value of this motor. 3869942 TOI27IP 6113138. Thank you.

Last edited by DustinC; Feb 5, 2023 at 06:44 PM. Reason: Add photo
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Old Feb 4, 2023 | 01:32 PM
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Any numbers on the block pad?
Pics of casting and stamped #s?

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Old Feb 4, 2023 | 01:41 PM
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New to this forum and honestly don't know how to add a photo. Working on it 3869942 on rear drivers side. Says HI PERF on the other.
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Old Feb 4, 2023 | 01:43 PM
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How about numbers stamped on passenger side of block in front of the cylinder head?
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Old Feb 4, 2023 | 02:36 PM
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Not seeing those numbers, are they supposed tobe raised like the ones on the back of the block?
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Old Feb 4, 2023 | 02:41 PM
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Originally Posted by DustinC
Not seeing those numbers, are they supposed tobe raised like the ones on the back of the block?

not raised stamped in. Could be filled with paint or could be gone. Would be in front of passenger side head
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Old Feb 5, 2023 | 01:19 PM
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Found some numbers. outside edge TOI27IP, those are capitol i's and the inside # 6113138
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Old Feb 5, 2023 | 01:31 PM
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IP is an L72 427-425HP block
Nice Find
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