Engine block Identification question 3914660
Thread Starter
Drifting
Joined: Aug 2006
Posts: 1,719
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From: Florida
St. Jude Donor '07
Engine block Identification question 3914660
I am trying to ID a 327 Engine block # 3914660, pad # 18Z120285,
T1127EC. It appears to be 1968 327, 275 or 300 HP. But here is my question. On the back of the block is normally a casting date. It reads "CONV1"? What does that mean?
T1127EC. It appears to be 1968 327, 275 or 300 HP. But here is my question. On the back of the block is normally a casting date. It reads "CONV1"? What does that mean?
Race Director
Joined: Jul 2001
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CONV1 was the conveyor line or mold number. The casting date should be in it's usual location on the top right hand side of the bell housing flange. The casting date when you find it should have two digits for the year, unlike Flint blacks that used just one digit.
This casting number was used in 1968 only, on all sorts of HP levels. This is borne out in the 8 in the VIN derivative 18Z120285. The Z means that the car was built in the Fremont Chevrolet plant.
The T in the engine machine code means that it was built in the Tonawanda NY plant. No SB Corvette engines were built there. 1127 means that it was assembled on November 27th. The only listing I can find for EC in '68 was Nova 275HP L-30 Power glide 4-Brl Hyd Cam.
This casting number was used in 1968 only, on all sorts of HP levels. This is borne out in the 8 in the VIN derivative 18Z120285. The Z means that the car was built in the Fremont Chevrolet plant.
The T in the engine machine code means that it was built in the Tonawanda NY plant. No SB Corvette engines were built there. 1127 means that it was assembled on November 27th. The only listing I can find for EC in '68 was Nova 275HP L-30 Power glide 4-Brl Hyd Cam.
Thread Starter
Drifting
Joined: Aug 2006
Posts: 1,719
Likes: 1
From: Florida
St. Jude Donor '07
Thanks guys. Here is the final summary:
327 Engine block # 3914660,
This casting number was used in 1968 only, on all sorts of HP levels
Pad #18Z120285, 8 in the VIN = 1968
CONV1 was the conveyor line or mold number.
Pad # T1127EC
T = Tonawanda NY Engine plant
1127 = Nov 27
EC in '68 was Nova 275HP L-30 Power glide 4-Brl Hyd Cam.
327 Engine block # 3914660,
This casting number was used in 1968 only, on all sorts of HP levels
Pad #18Z120285, 8 in the VIN = 1968
CONV1 was the conveyor line or mold number.
Pad # T1127EC
T = Tonawanda NY Engine plant
1127 = Nov 27
EC in '68 was Nova 275HP L-30 Power glide 4-Brl Hyd Cam.
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1st Gear
Joined: Jul 2012
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I have a question regarding the T1127 code. The code on my sons 327 that he just acquired is T1127HM. Whenever I try to do a search for that code it keeps coming to the 'EC' code. Can anyone help me to find out what we have here?
Thanks to any and all help,
Randie Coulter
Fort Smith, AR
Thanks to any and all help,
Randie Coulter
Fort Smith, AR
Race Director
Joined: Jul 2001
Posts: 15,892
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T1127 means an engine assembled in the Tonawanda NY plant on Nov. 27. The year is not included in this code and must be obtained (with the casting number of the block) to narrow down what type of car the engine was installed in. The HM code was used three times in different years.
2nd Gear
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2nd Gear
Joined: Sep 2020
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Sorry I just scored an engine with the exact numbers and researching those numbers the thread came up so dig deeper and shared. I thought I had a vette engine and was very excited about it . Then I found that it was from a camero.
1st Gear
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Engine decode
I Bought a 68 Camaro that has that engine in it.
does anybody know what it’s from?
thanks
Al
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,135
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From: US-PNW
HH 65 327 365 4B,MT CO
HH 66 327 300 4B,AIR,MT CO
HH 67 327 300 4B,AIR,MT CO
HH 69 350 300 4B,TH400 PA
"CO" is Corvette, "PA" is passenger car – however, since no Corvette 327 or 350 engines were cast and assembled at the Tonawanda NY plant (evidenced by the T in the T0708HH code), it has to be the '69 350 from a passenger car. You can confirm this by looking for the casting date on the block. It's probably on the rear flange where the trans mounts, passenger side.
Melting Slicks
Joined: Aug 2001
Posts: 3,050
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From: Wichita KS
Apc
Welcome to Corvette Forum.
John Hinkley article on Camaros.org (link below) has information on reading casting numbers. Many articles on that site are applicable to Corvette.
Mapman
http://www.camaros.org/pdf/cast_codes.pdf
Welcome to Corvette Forum.
John Hinkley article on Camaros.org (link below) has information on reading casting numbers. Many articles on that site are applicable to Corvette.
Mapman
http://www.camaros.org/pdf/cast_codes.pdf
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