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Verifying 1971 GS 350/455

Discussion in 'The "Paper Trail"' started by BQUICK, Oct 29, 2019.

Page 1 of 2
  1. BQUICK

    BQUICK Gold Level Contributor

    Can't find the thread but Duane was saying big blocks had 4 holes in frame behind license plate. My GS455 only has the 2 round ones and it has a T400 with the VIN on it so I'm sure it's a 455 car.
    Any other possible indicators other than steering joint?
     
    BQUICK, Oct 29, 2019
    #1
  2. Duane

    Duane Member

    I don't know about the holes, but the Big Block 71 frames have a different part number/Letter code then the Small Block frames.
    Duane
     
    Duane, Oct 29, 2019
    #2
  3. tdacton

    tdacton Gold Level Contributor

    Here is my Flint built GS BB frame #.
    Troy Frame rail PN.jpeg
     
    tdacton, Oct 30, 2019
    #3
  4. Buickone

    Buickone Founders Club Member

    I know mines a 72, but the BA code is what identifies it as a BB frame, Flint built.
     

    Attached Files:

    Buickone, Oct 30, 2019
    #4
  5. MRP

    MRP Well-Known Member

    This is a photo of my 1971 455 car frame, you should find some kind of numbers/letters like this if you look under the left rear 1/4 panel behind the tire, they should be on the outside of the frame rail. Good luck.
     

    Attached Files:

    MRP, Nov 22, 2019
    #5
  6. BQUICK

    BQUICK Gold Level Contributor

    Here's mine DSCN4570.JPG
     
    BQUICK, Dec 1, 2019
    #6
  7. tdacton

    tdacton Gold Level Contributor

    That is cool! Did you notice yours and mine came out of the exact same batch?
    Troy
     
    tdacton, Dec 1, 2019
    #7
    thepartsman likes this.
  8. BQUICK

    BQUICK Gold Level Contributor

    Cool!
    So 1237139 is BB frame?
     
    BQUICK, Dec 1, 2019
    #8
  9. tdacton

    tdacton Gold Level Contributor

    tdacton, Dec 1, 2019
    #9
  10. BQUICK

    BQUICK Gold Level Contributor

    I know my car is a 455 car but nice to have more evidence than the T400 with VIN since it is a 1971.....
     
    BQUICK, Dec 1, 2019
    #10
  11. 64 Hardtop

    64 Hardtop Founders Club Member

    [​IMG]Can someone please tell me the build date on this frame? or what the 2 12 713 stands for. Picture from above post.
     
    64 Hardtop, Dec 18, 2019
    #11
  12. Duane

    Duane Member

    Build date 2/12/71
    Duane
     
    Duane, Dec 18, 2019
    #12
  13. 64 Hardtop

    64 Hardtop Founders Club Member

    Thanks Duane. The reason I am asking is on my X it appears clearly to have a 455 frame part number. However the date code appears clearly as 12713 and wondered if that could be a correct date. Being 1/2/71 three months before the build date. My frame is very rusty and a couple numbers are hard to read.
     
    Last edited: Dec 18, 2019
    64 Hardtop, Dec 18, 2019
    #13
  14. Duane

    Duane Member

    1237139 is the part number for the frame, which would be a "BA" frame, and would make it a 71-72 455 frame for a 2-door coupe/sedan.

    The "12713" number is the date code for the frame, which would be "1/2/71", and the number "3" is possibly the shift code, ie. 3rd shift.

    What is the Build date on the ID plate on the firewall?
    Duane
     
    Duane, Dec 18, 2019
    #14
  15. Mike Sobotka

    Mike Sobotka Founders Club Member

    Duane, Do the convertible frames have a diffrent part number?
     
    Mike Sobotka, Dec 19, 2019
    #15
  16. 64 Hardtop

    64 Hardtop Founders Club Member

    04D
     
    64 Hardtop, Dec 19, 2019
    #16
  17. Duane

    Duane Member

    "Duane, Do the convertible frames have a different part number?"

    Yes
     
    Last edited: Dec 19, 2019
    Duane, Dec 19, 2019
    #17
  18. Duane

    Duane Member

    Dwayne,
    I will check the date code on my frame, I think my car was also built in April.

    Some of the other posters here have the 2/12/71 dated frame, Could they post the date code off their ID plates?
    Duane
     
    Duane, Dec 19, 2019
    #18
  19. tdacton

    tdacton Gold Level Contributor

    You say you have a part number 12713, I'd suggest you have the same batch date code 2 12 71 3, 2/12/71 3rd shift. Is there any chance there is a 2 in front of that 12713?

    My car is an 02C
    Troy
     
    tdacton, Dec 19, 2019
    #19
  20. Duane

    Duane Member

    That is very possible. For the 1971 model year they made very few B.B. Buicks, so the date codes for the B B parts, and especially the Stage 1 specific parts, often have a larger gap then they did in the 1970 and earlier years.

    I will check the date code on my frame when I can. I know mine is the correct frame as we found the vin number on it when it was apart.
    Duane
     
    Duane, Dec 19, 2019
    #20
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