Help with identifying engine block
Thread Starter
Instructor
Joined: Aug 2005
Posts: 199
Likes: 7
From: Henderson Nevada
Help with identifying engine block
I recently purchased a 1966 Corvette with and I am trying to identify what engine is in it. The engine block is stamped stamped with the following numbers:
Blocking casting # 3959512
Block casting date # K84
Stamp Pad # CE5N2 68
The CE on the stamp would indicate that the block is a 1968 or later. The block casting number indicates that the block is either 1962 - 1963 or 1969 - 1973 depending on what table you look at. The casting date code would indicate that the block was cast on November, 1964. Based on the CE numbers I think I have a Chevrolet Exchange 327 block manufactured in 1968 or 1969. However, the block casting number and block casting date don't agree. Any help with a positive identification would be appreciated.
Blocking casting # 3959512
Block casting date # K84
Stamp Pad # CE5N2 68
The CE on the stamp would indicate that the block is a 1968 or later. The block casting number indicates that the block is either 1962 - 1963 or 1969 - 1973 depending on what table you look at. The casting date code would indicate that the block was cast on November, 1964. Based on the CE numbers I think I have a Chevrolet Exchange 327 block manufactured in 1968 or 1969. However, the block casting number and block casting date don't agree. Any help with a positive identification would be appreciated.
Safety Car
Joined: Aug 2006
Posts: 3,881
Likes: 1,283
From: Horsham Pa
C2 of Year Finalist (appearance mods) 2019
CE blocks where only installed in a corvette if the original block was damaged beyond repair (at the time). The 2870 blocks where used from 62 to 65 I believe the 512 blocks where cast for replacement as far back as 64
I recently purchased a 1966 Corvette with and I am trying to identify what engine is in it. The engine block is stamped stamped with the following numbers:
Blocking casting # 3959512
Block casting date # K84
Stamp Pad # CE5N2 68
The CE on the stamp would indicate that the block is a 1968 or later. The block casting number indicates that the block is either 1962 - 1963 or 1969 - 1973 depending on what table you look at. The casting date code would indicate that the block was cast on November, 1964. Based on the CE numbers I think I have a Chevrolet Exchange 327 block manufactured in 1968 or 1969. However, the block casting number and block casting date don't agree. Any help with a positive identification would be appreciated.
Blocking casting # 3959512
Block casting date # K84
Stamp Pad # CE5N2 68
The CE on the stamp would indicate that the block is a 1968 or later. The block casting number indicates that the block is either 1962 - 1963 or 1969 - 1973 depending on what table you look at. The casting date code would indicate that the block was cast on November, 1964. Based on the CE numbers I think I have a Chevrolet Exchange 327 block manufactured in 1968 or 1969. However, the block casting number and block casting date don't agree. Any help with a positive identification would be appreciated.
Last edited by 65 Pro Vette; Jul 30, 2014 at 04:52 AM.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Assembled as a short block in 1975 for over the counter sale or warranty replacement.
No telling what it was first installed in or what mechanicals it might have without disassembly.
2nd Gear
Joined: Apr 2022
Posts: 2
Likes: 0
can someone tell me what these numbers identify ... 3782870 on the bellhousing flange and J251 and "FIIOIS" is on the passenger side front machine plate and inside the bellhousing is H-11 with 935 on top of 870 thank you for your help
Race Director
Joined: Oct 2000
Posts: 12,666
Likes: 3,122
From: Shamong, NJ
J251 is the block's casting date, "J" is October, "25" is the 25th day of the month and "1" is 1961. Your 870 block was cast on October 25, 1961.
F1101S is the identifier and assembly date, that was stamped on the block during assembly. "F" is the Flint MI engine plant, "11" is November "01" is the first day of the month, and "S" is the engine suffix code used to identify the engine, in this case a 1962 327/250 with a Powerglide from a 1962 full size Chevrolet.
So the engine you have is a 1962 full size Chevrolet 327/250 originally backed up by a Powerglide automatic trans, with a block cast on October 25, 1961, and assembled on November 1, 1961.
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