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  • Decoding 1972 Protect-O-Plate

     

    1972 Labelled Sample.png

    Note that there are some plates that do not have all of these details but it is not common.

  • Vehicle Identification Number
    See VIN decode page

    Carburetor Manufacturer 
    B - Bay City
    C - Carter                
    R - Rochester

    Engine Info
    Assembly Plant
    F or V - Flint, Michigan
    K - McKinnon Industries
    T - Tonawanda Engine Plant

    Assembly Date
    Month
    01 - January
    02 - February
    03 - March
    04 - April
    05 - May
    06 - June
    07 - July
    08 - August
    09 - September
    10 - October
    11 - November
    12 - December
    Day   
    01 to 31

    Engine Suffix Code
    CDA - 350 ci 2-barrel with manual trans
    CDD - 350 ci 4-barrel with TH 350 trans
    CDG - 350 ci 2-barrel with manual trans
    CKA - 350 ci 2-barrel with manual trans
    CKB - 350 ci 2-barrel with TH 350 trans
    CKD - 350 ci 4-barrel with TH 350 trans
    CLB - 402 ci 4 barrel with TH 400 trans
    CMD - 350 ci 2-barrel with TH 350 trans
    CPD - 454ci 4 barrel with TH 400 trans
    CRW - 454ci 4 barrel with TH 400 trans
    CTB - 402 ci 4 barrel with TH 400 trans
    CTL - 350 ci 2-barrel with TH 350 trans

    Rear Axle Info
    Axle Prefix Code
    CF - 3.31:1 with Positraction        
    CH - 2.73:1 with Positraction        
    CW - 3.31:1        
    GA - 2.56:1        
    GB - 2.56:1 with Positraction        
    GC - 2.73:1        
    GD - 2.73:1 with Positraction        
    GH - 2.73:1
    KD - 2.73:1   
    RU - 3.31:1        
    RV - 3.31:1 with Positraction

    Assembly Plant
    C - Buffalo, NY            
    G - Chevrolet Gear & Axle            
    W - Warren, MI            
    K - McKinnon Industries

    Assembly Date
    Three digit Julian date starting with Jan 1, 1970
    Example: 028 is January 28, 1970. 365 is December 31, 1970.

    Shift
    1 - First shift
    2 - Second shift
    Note that not all plates have shift codes

    Positraction Code
    E - Eaton Positraction

  • Assembly Month
    H - August
    J - September
    K - October
    L - November
    M - December            
    A -January            
    B - February            
    C - March            
    D - April            
    E - May            
    F - June            
    G - July

    Transmission Info
    Turbo Hydra-Matic 400

    Model year
    72 - 1972 model year

    Engine Type
    D - 402 engine
    F - 454 engine

    Date of Build
    Three digit Julian date starting with Jan 1, 1971

    All other transmissions

    Assembly Plant and Transmission Type
    B - Cleveland Turbo Hydramatic 350        
    D - Sagiunaw 3-speed manual
    J - GM of Canada Turbo Hydramatic 350
    K - McKinnon Industries 3-speed Manual        
    M - Muncie 3-speed manual        
    O - Saginaw
    S - Saginaw 3-speed manual
    W - Warner Gear 3-speed manual
    Y - Toledo Turbo Hydramatic 350

    Year            
    2 - 1972 model year        

    Assembly Month            
    M - August
    P - September    
    R - October    
    S - November    
    T - December    
    A - January    
    B - February    
    C - March    
    D - April    
    E - May    
    H - June    
    K - July

    Assembly Day
    01-31

    Assembly Shift
    D - Day shift
    N - Night shift
    Note not all plates have shift codes

  • Recent Posts

    • willie
      class is in

      By willie · Posted

      Dennis i will get you some pics, when i can.
    • 502ci
      2024 Eastern Meet Attendees And Other Stats As Of Sep 27, 2023

      By 502ci · Posted

      I am seeing 50 names on the list with yours included.
    • Rob Peters
      2024 Eastern Meet Attendees And Other Stats As Of Sep 27, 2023

      By Rob Peters · Posted

      As of today, we have  hit 50 members registered with me to attend the Eastern Meet.  This a great number for it still being almost 7 months until this meet.  Keep those registrations coming in.  As you look at this list, if you don't see a name on the list you think should be there, please contact that member to see if they are interested in attending and please have them get in touch with me. Here is an updated listing of members registered with me: Bob Bardou         New York Sammy Barnette     North Carolina Kenneth Bower       Virginia CK Collins                New York Dennis Collins          New York Willie Conforti          New York Jim Covello              Pennsylvania Randy Czankner       Pennsylvania Brian Den Bleyker     New Jersey Tony Divirgilio            Pennsylvania Aaron Dodsworth      British Columbia Canada Kevin Ferrante           New York Tom Ferrante            New York Jeffrey Freeman           New York Jolene Garvin         Pennsylvania Andy Gorzynski       Pennsylvania Doug Guenther       New York Carl Hanson            Virginia Marty Jenkins        New York Leo Konik                Michigan Bryan Mauger         Ohio Ryan Misrasi          Utah Jeffy Mullen            Maryland Paul Mullen              Maryland Jay Munday           Pennsylvania Frank O'Connell       Massachusetts Geraled Patterson    Virginia Rob Peters                Pennsylvania Patrick Peters           Pennsylvania Glen Popiela              Illinois Seth Primack            New York John Principato        Ontario Canada Bill Rees                    Ohio Jared Richey             South Carolina John Rodi                  Connecticut Joe Roman              Pennsylvania Dan Ruland               New York James Seyboldt        Florida Jerry Skidmore         Tennessee Jim Stead                  New York Michael Stevens       Pennsylvania Joe Sullivain               Pennsylvania Michael Talerek         New York Joe Tedesco               New York Ron Tevis                   Kentucky Dennis Tretter            Ohio Mark Truman              Florida Gary Vanatter            Pennsylvania Bob Wiemels            Ohio Donny Vestal           Tennessee Mike Zecca              Pennsylvania   rob
    • Dtret
      Quadrajet needed

      By Dtret · Posted

      Very nice Vaughn 
    • Dtret
      class is in

      By Dtret · Posted

      What are you going to do with the junk block. I’m might need it for my chevelle. I can fix it. ( lol add it to the list). I have some blocks here that might suit your needs. 
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