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Old Jun 22, 2013 | 10:34 AM
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I'm sure this question has been asked and answered before but I'm a new member so please forgive. I have a 1958 Corvette - the engine casting number is 3756519 which should be correct. the number stamped on the pad under the right head is F07IID. Does this make sense? Thank you!
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Old Jun 22, 2013 | 10:47 AM
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The casting # is correct for your car. However the D code on the engine pad indicates that it was not originally install in your car. The engine was assembled on July 11. The casting date is on the opposite side of the casting # will provide the year.
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Old Jun 22, 2013 | 11:19 AM
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Thank you for the quick reply. Can you expand a bit on the D code issue? I'm not sure I understand what you are telling me. The casting opposite says G 8 0 as near as I can read it. The G 8 I'm sure about the 0 is a bit hard to make out.
I think what you are saying is that the casting # indicates it is the correct ?? engine but that it was not the original ? ? I've had the car since 1970. Thanks again
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Old Jun 22, 2013 | 12:34 PM
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The G80 casting date indicates that the block was cast on July 8th 1960. The F0711D indicates that the engine was assembled on July 11th in the Flint Michigan assembly plant. The D indicates that the engine was originally a 283cu. in./170HP with a powerglide transmission installed in a Chev passenger car, but not a Corvette.
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Old Jun 22, 2013 | 12:38 PM
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if this car is or was originally Powerglide, not so fast to discount this motor. clean that pad real good and look for a letter after the "D" G, H or J.
sometimes factory added last letter separately
also make absolutely sure of casting date.
vin would help too.
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Old Jun 22, 2013 | 01:02 PM
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Default Casting Date

Take another look at that G80---It might be G88 with a thin cross line in what you think is a zero. It's too much of a coincidence for the casting date and assembly date to be so close and also in the right order. Take some carburetor cleaner or brake cleaner and clean the date well. You might be surprised. It still won't be "matching" number, but you will know what year the block actually is.


RON

Last edited by rongold; Jun 22, 2013 at 01:09 PM.
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Old Jun 22, 2013 | 01:17 PM
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Originally Posted by lee1958
the number stamped on the pad under the right head is F07IID. Does this make sense? Thank you!
Is it F0711D, or F711D ?

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Old Jun 22, 2013 | 02:45 PM
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Originally Posted by Mike Ward
The G80 casting date indicates that the block was cast on July 8th 1960. The F0711D indicates that the engine was assembled on July 11th in the Flint Michigan assembly plant. The D indicates that the engine was originally a 283cu. in./170HP with a powerglide transmission installed in a Chev passenger car, but not a Corvette.
I thought the casting date for all corvette motors had a single digit (in this case an 0) for 1960 and all passenger cars had two digits which would be 60. So reguarless of the number on the front pad isn't this a corvette block
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Old Jun 22, 2013 | 05:30 PM
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Originally Posted by MOXIE62
I thought the casting date for all corvette motors had a single digit (in this case an 0) for 1960 and all passenger cars had two digits which would be 60. So reguarless of the number on the front pad isn't this a corvette block
Single year digit is for the Flint foundry, double digit is for Tonawanda. Flint made lots of engines for car aside from Corvettes as well as trucks. With very few exceptions no Corvette small blocks were cast in Tonawanda.
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Old Jun 23, 2013 | 09:52 AM
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Thank you everyone for your help. The Vin is J58S105466 if that helps solve the issue somehow.

The zero in the G80 seems to be filled in. Perhaps a casting issue? I have carefully cleaned the engine pad and there does not appear to be anything following the D in the string there.
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Old Jun 23, 2013 | 10:08 AM
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Your car was assembled on March 21 1958, +/- a few days. Irrespective of whether the engine casting date is 1958 or 1960, it's too late for a March '58 car.
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Old Jun 23, 2013 | 10:09 AM
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Originally Posted by lee1958
Thank you everyone for your help. The Vin is J58S105466 if that helps solve the issue somehow.

The zero in the G80 seems to be filled in. Perhaps a casting issue? I have carefully cleaned the engine pad and there does not appear to be anything following the D in the string there.
The fact that the pad is stamped F07IID means that it was definitely built after mid-Jan. 1960. That's when Chevrolet started using a leading zero on single digit months. Your engine is not original.

Jim
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Old Jun 23, 2013 | 11:27 AM
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Lee1958
From Chevy Mania.
CUL Jim

Code Year CID Vehicle HP RPO Trans Carb Comments
D 56 265 Truck 205 410 Manual 4-Brl
D 58 283 Impala 185 Base Power glide 2-Brl
D 59 283 Impala 185 Base Power glide 2-Brl
D 60 283 Impala 170 Base Power glide 2-Brl Hyd Cam
D 61 283 Impala 170 Base Power glide 2-Brl Hyd Cam
D 62 283 Impala 170 Base Power glide 2-Brl Hyd Cam
D 63 283 Impala 195 Base Power glide 2-Brl Hyd Cam
D 64 283 Impala 195 Base Power glide 2-Brl Hyd Cam
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