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Technical Need help decoding a small block Chevy engine

Discussion in 'The Hokey Ass Message Board' started by Jamoke, Sep 29, 2020.

  1. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    In the back of the engine it does say 5.7 but when I look up the number that's on the head it says the heads are from a 305 and here is a photo of the pad on the passenger side if you can help me decode this it would be great want to see if it's worth building this engine 20200929_122030.jpg
     
  2. S10_37
    Joined: Jan 4, 2009
    Posts: 69

    S10_37
    Member

  3. Bob Lowry
    Joined: Jan 19, 2020
    Posts: 488

    Bob Lowry

    Look at the driver's side, behind the head, on the bellhousing flange. If you want to know the year and month of
    production, look at the same place on the passenger's side.
     
  4. 305 heads have been put on 350's/5.7's many a time. Are the heads 416's?
     

  5. Mr48chev
    Joined: Dec 28, 2007
    Posts: 28,335

    Mr48chev
    ALLIANCE MEMBER

    I'm not finding FPR in the regular go to sources for suffix codes. I have to go with S10-37 in that you need to start with the casting number of the block from the back left corner.
     
  6. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    Yes
     
  7. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

  8. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    I'm really don't understand it this engine have a throttle body injection on it and it says the suffix code is a 1978 no TBI in 78
     
  9. J. A. Miller
    Joined: Dec 30, 2010
    Posts: 1,512

    J. A. Miller
    ALLIANCE MEMBER
    from Central NY

    Paging @squirrel please pick up the white courtesy phone.
     
    Deuces and lothiandon1940 like this.
  10. Mr48chev
    Joined: Dec 28, 2007
    Posts: 28,335

    Mr48chev
    ALLIANCE MEMBER

    Suffix code orange sbc (2).jpg Where are you finding any FPR suffix code? unless my eyes are seeing it wrong.
    I even found one source I have never seen before http://mkmann.com/pdf/SBBlockID.pdf

    That shows the codes by year and it isn't there.

    Now what is the casting number off the back of the block?
     
  11. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

  12. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    Screenshot_20200929-141806_Chrome.jpg
     
  13. Mr48chev
    Joined: Dec 28, 2007
    Posts: 28,335

    Mr48chev
    ALLIANCE MEMBER

  14. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    Attached Files:

  15. Mr48chev
    Joined: Dec 28, 2007
    Posts: 28,335

    Mr48chev
    ALLIANCE MEMBER

    What I can find is that the engine was assembled in flint Michigan on July 2. What year I don't know but that would come with the date code on the block plus the casting number will give the bore size and an approximate year. I've pretty well blown the last hour on this, have been on more sites that have suffix codes than you can count and none as I said before show an FPR code at all for any engine.
    https://www.speedwaymotors.com/the-toolbox/small-block-chevy-engine-codes/28660
    http://mkmann.com/pdf/SBBlockID.pdf
    http://casting.brianesser.com/engine-codes-2/small-block-chevrolet-engine-suffix-codes/
    This is the normal small block Chevy go to suffix code source
    https://nastyz28.com/decode.php
     
  16. Black Panther
    Joined: Jan 6, 2010
    Posts: 1,681

    Black Panther
    Member
    from SoCal

    The assembly code is FPR...I couldn't find it anywhere either. The stuff stamped underneath might be a partial vin. Can't tell. Its a later 70s engine at the earliest because of the short pad for the assembly info. I think they switched to the short pad about 1977 give or take a year or two..
     
  17. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    Thank you so much for your hard work trying to find this I have a feeling that somebody put a lot of stuff from different engines on this block I also think it's a waste of money for me to build this I understand the 305 heads from small combustion chamber but they do not flow worth a shit
     
  18. flatheadpete
    Joined: Oct 29, 2003
    Posts: 10,088

    flatheadpete
    Member
    from Burton, MI

    ...One of the better things from Flint...days gone by.
     
  19. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    And also these are center bolt heads throttle body injection with 5.7 on the back of the engine
     

    Attached Files:

  20. Those are not 416 305 heads.
     
  21. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member



    1986-91 14101081 305 1.84 1.5001 - junk cylinder head for high performance
     
  22. Your the one who agreed that they were 416's earlier is my only point.
     
  23. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    Sorry about the misunderstanding
     
  24. egads
    Joined: Aug 23, 2011
    Posts: 959

    egads
    ALLIANCE MEMBER

    FPR --truck 1987 350 160 hp manual
     
  25. squirrel
    Joined: Sep 23, 2004
    Posts: 47,760

    squirrel
    Member

    partial VIN says CH...... which means Chevy truck from 1987, so yeah, it looks like the post above this is the answer you're looking for
     
  26. mike in tucson
    Joined: Aug 11, 2005
    Posts: 499

    mike in tucson
    Member
    from Tucson

    egads is correct
    federal emissions 1 ton according to the book
     
  27. Jamoke
    Joined: Sep 1, 2011
    Posts: 698

    Jamoke
    Member

    That explains the non roller set up thank you everybody for the help
     

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