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Canadian Poncho Homepage -> Canadian Poncho -> General Engine Performance Forum -> SBC id help please......
Post Info TOPIC: SBC id help please......
unclebernie


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SBC id help please......
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I have had these motors a while, and never had any info on year, hp or what they were from.  So I took photos of the id numbers behind the alt. area.  The one reads easily, the other is pretty rough, so the small numbers aren't very legible.  Hopefully someone can help me so I know what I have......confuse

 

Thanks in advance.....  
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-- Edited by unclebernie on Tuesday 1st of December 2009 07:27:46 PM

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John

1972 Pontiac Lemans (daughter's car) 
2005 Pontiac Grand Am
2004 Ford Explorer Sport Trac
68sd


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CMJ is a 1980 305 Camaro/Full Size

C8C is a 79 350 Monte Carlo



-- Edited by 68sd on Tuesday 1st of December 2009 07:38:26 PM

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unclebernie


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Interesting, I was to understand that both were 350cu.in The CMJ model came in a Monte Carlo I bought years ago, but it was put in later. I know when he first put it in it had an olderstyle "tall" 2 bbl carb on it so I thought it was older than that......... Might have to rethink that I guess!!!! When did they start casting the engine size on the block sides????? Thanks for the input.......

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John

1972 Pontiac Lemans (daughter's car) 
2005 Pontiac Grand Am
2004 Ford Explorer Sport Trac
427carl


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P1010517_1024x768.JPG

P1010528_1024x768.JPG

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427carl


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unclebernie wrote:

 When did they start casting the engine size on the block sides?????


        Who said they did? confuse



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unclebernie


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427carl wrote:

unclebernie wrote:

 When did they start casting the engine size on the block sides?????


        Who said they did? confuse


I thought I had seen in the past some newer engines had the displacement cast on the side of the block.....I'm sure it was on a 305......

 



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John

1972 Pontiac Lemans (daughter's car) 
2005 Pontiac Grand Am
2004 Ford Explorer Sport Trac
80GPLJ


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Check block casting # near bell housing

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unclebernie


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Just checked the casting #'s and they are both the same 3970010..... found some info on another site with the suffix code being used multiple times

CMJ 1974 350 t4OO police - 4 full size
CMJ 1980 305 automatic trans. H - - full size/Camaro


Also read the post on your casting #........no luck yet?????

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John

1972 Pontiac Lemans (daughter's car) 
2005 Pontiac Grand Am
2004 Ford Explorer Sport Trac
80GPLJ


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definitely a 350 block - check the other resurrected forum - front pad stamp not 100% accurate - mine is a 350


-- Edited by 80GPLJ on Tuesday 1st of December 2009 10:43:21 PM

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Beaumont4008


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Yep 3970010 is a 350. I have one in my garage also. Has a 4 inch bore.

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Ghost Post


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The CMJ block would be from an application earlier than 1977 being it has the larger style suffix pad..
The 010 casting have always been rumored to be the higher nickel content blocks..
Yes you can dig for casting dates but when Vin stampings are present count backwards 8 digits to confirm the model year..
Further Vin stamp decoding will show what model line and plant the car was produced at too..
Not that the 74's were kicking out high HP but it's kinda' cool if it's the Police motor!.


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-- Edited by Ghost Post on Wednesday 2nd of December 2009 08:16:37 AM

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