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08-23-2019, 01:52 PM
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#1 |
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Registered User
Join Date: Feb 2015
Location: Alberta, Canada
Posts: 148
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SBC date code
Hi, I’m looking for some help deciphering the age of this 283 block.
It has a forged crank and the suffix code has been machined off. All sources I’ve checked have said date codes were: “Letter” “Number” “Number” Location Month Year (last digit of year) This appears to have “Letter” “Letter” “Number” “Number” Not sure what the “M” means. Any help is appreciated. Posted via Mobile Device |
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08-23-2019, 03:23 PM
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#2 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: SBC date code
Does this help? https://www.corvetteforum.com/forums...3756519-a.html
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08-24-2019, 01:12 AM
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#3 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: SBC date code
What you are seeing as a letter I at the beginning , I think is just a part of the tag used in the mold. IMO this block date code is A 2 5. That translates to January 2 1965
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09-02-2019, 10:00 PM
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#4 |
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Registered User
Join Date: Nov 2011
Location: Port St. Joe Fl.
Posts: 491
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Re: SBC date code
https://www.mortec.com/castnum.htm M means It was cast in Mexico.
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10-02-2019, 01:17 PM
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#5 |
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Registered User
Join Date: Aug 2015
Location: Alcoa;Tn
Posts: 208
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Re: SBC date code
The casting no. shows 58-62 283.
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'71 Cheyenne Super LWB - Second Owner in 39 Years! '70 CST/10 SWB - Soon to be Daughter's truck when finished |
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10-03-2019, 07:13 PM
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#6 |
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Account Suspended
Join Date: Jun 2015
Location: No longer here
Posts: 1,000
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Re: SBC date code
The casting number 3756519 was only cast during the years of 1958 thru 1962;
The first number on the casting date is a "1" which would be 1961. year options would only be 8, 9, 0, 1, 2 The letter A would be for January. The number 25 is the day of the month. 1 A 25 = January 25, 1961 with a casting number 3756519 I believe it would not be January 2, 1965 because this casting number was not cast in 1965. Also, GM casting number 3556519 (283) was only cast during the years of 1958 thru 1961 not to be confused with the other one 3756519 (283) ..... ++++++ January 2, 1965 was a Saturday and January 25, 1961 was a Wednesday. This is only my opinion..... Last edited by YoungPup1977; 10-03-2019 at 11:00 PM. |
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