Hi Ron I can’t speak for 58 but my 57 definitely had the engine stamped on 
  the top of the chassis, located on the driver’s side about the position of the 
  rear of the front door. Now this number as others have said, is SO light that 
  even when you have seen it once and know where to look, it’s hard to see a 
  second time. I did manage to photograph it though.
  Glenn.
  On October 6, 2017 at 2:17 AM Ron Waters 
    <ronbo97@xxxxxxxxxxx> wrote:
    I've never seen 
    any evidence that Plymouth stamped or painted engine or VIN numbers on the 
    frame in '58. That includes my 58 Plymouth, which had a frame off 
    restoration. I removed the body from the frame and there were no 
    numbers.
     
    Ron
    
    
 
    Ron
      The body was off the frame. I would think that the number can be 
    found by simply removing the left rear tire to expose the frame.
       John Teske
    
    
    
    
    Sent from my Verizon, Samsung 
    Galaxy smartphone
 
    
    
    -------- Original message --------
    From: Ron Waters <ronbo97@xxxxxxxxxxx>
    Date: 10/5/17 7:43 AM (GMT-05:00)
    To: L-FORWARDLOOK@xxxxxxxxxxxxx
    Subject: Re: [FWDLK] 58 plymouth number questions
    
 
    Mischa - That 
    number is a casting number, which may also be the same as the part number. 
    The actual engine number is located on the block behind the power steering 
    pump. It should be LP8xxxxxxx. 
     
    I'm not aware 
    of Plymouth stamping or painting engine numbers on the frame. Even if they 
    did, you would have to remove the body from the frame in order to see it. 
    
     
    Ron
    
    
 
    
    
    Dear Forward-look-lovers,
     
    Thanks for all the answers so far!
     
    I forgot to mention the engine number, it is, as said, on the right; 5 
    - 1737929. It is a 318 V8. So if I read it right this number should match 
    the number on the chassis (if it is still somewhere...)?
     
    The car is definately a Belvedere, by the looks of it. I bought the car 
    in this state, it was not restored by me. I think it is restored just the 
    way it originaly was, and not to make it look like Christine. If that was 
    the case, too many mistakes were made. To begin with the color red is the 
    Toreador red, not the Royal red which Christine had. Also the interior, 
    which has been completely renewed, is black and grey in the same pattern the 
    Belvedere used to have. If it was restored to look like Christine they would 
    have chosen red I guess.
     
    Greetings,
      
    
 
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