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Thread: Engine ID
          
   
   

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  1. #1
    jima is offline CHR Junior sMember Visit my Photo Gallery
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    Engine ID

     



    Just bought an '81 El Camino. Originally had a 6 cyl but now with a SBC. Supposed to be a 350 but I'd like to know for sure what it is. I've checked all the web sites I could find but have not found matching block casting number/block stamp.

    Casting number: 8970010 (First digit IS 8, not 3.)

    Stamp: V0421TAG Can't find "TAG" in any list.

    Don't have a VIN.

    Any help would be great.

  2. #2
    techinspector1's Avatar
    techinspector1 is offline CHR Member Visit my Photo Gallery
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    Quote Originally Posted by jima View Post
    Just bought an '81 El Camino. Originally had a 6 cyl but now with a SBC. Supposed to be a 350 but I'd like to know for sure what it is. I've checked all the web sites I could find but have not found matching block casting number/block stamp.
    Casting number: 8970010 (First digit IS 8, not 3.)
    Ummm, no, the first digit is NOT 8, it is 3. There was no casting number 8970010.
    3970010-302, 327, 350, 1968 to 1980.
    Post a casting number off the heads.....under the valve cover
    http://www.speednik.com/files/2013/09/stockCastNo.jpg

    Go back for a second look at that suffix number.

    .
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  3. #3
    robot's Avatar
    robot is offline CHR Member Visit my Photo Gallery
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    TAG is a 71 truck 350 255hp LS-9 with 400 turbo 4 bbl carb in a 3/4ton truck
    P body (van)
    techinspector1 and DennyW like this.

  4. #4
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    NTFDAY is offline CHR Member Visit my Photo Gallery
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    I could find no reference to a 8970010 casting code for a chevy block small, big or otherwise.
    The code for the engine in my 76 Vette is 3970010 and it can be either 2 or 4 bolt mains. Since mine started life as an L48 I suspect it's a 2 bolt main block and if I have to pull the engine to change cams I'll find out. That casting number was used from 69-79 so it's a pretty common block.
    Ken Thomas
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