understanding identaplate letters and numbers

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understanding identaplate letters and numbers

Postby mldeolde » Sun Jun 02, 2019 7:01 pm

was looking at my IMSA s vehicle identaplate today and wanted to know what my monza was originally. I believe there was some one in the club who had the ability to translate these things years ago. is that info or person still around :? ST75 1HRO7 ST003871 BDY-TOP LINE R 19Z 80L 8OU PN - SECOUND LINE 10D054067 -THIRD LINE I WAS TOLD BY ONE OF THE OTHER MEMBERS THAT THE UNDERSIDE OF THE HOOD INDICATES THAT IT WAS ORIGINALL A 4 CYLINDER CAR.
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1975 Chevrolet Monza IMSA


Re: understanding identaplate letters and numbers

Postby cjbiagi » Sun Jun 02, 2019 7:48 pm

Most of the info is in the Library. Look in General info and then scroll down to 1.14. https://h-body.org/library/hbodyfaq/index.html

1.15 How do I decode the trim tag on my H-body?

There are two styles based on the plant. However, Brian Melka (Bacchus_101573) notes that his '75 Canadian-built car has a tag like that shown below for the Ohio cars. So, check both...

Lordstown, OH plant (Vegas 1971-1977, Monzas 1978-up)

Examine this sample tag (found on or near firewall on most cars):

______________________________________
/ \
| ST 78 1HR07 U 344361 BDY |
| TR 19V A51 77L 77U PNT |
| 05B 19X 69-3681 |
| 191601 02BLK |
\______________________________________/

Top line, left to right:
* ST = printed on all tags, probably means "style"
* 78 = Year of production
* 1HR07 = Make, carline series, and bodystyle (see VIN decoding)
* U = Assembly plant (see VIN decoding)
* 344361 = Production Sequence
* BODY = printed on all tags

Second line, left to right:
* TR = printed on all tags, probably means "trim"
* 19V = Trim Combination Number (see option codes)
* A51 = Modular Seat Code (see option codes)
* 77L = Lower Body Color (see option codes)
* 77U = Upper Body or Fabric Top Color (see option codes)
* PAINT = printed on all tags

Third line, left to right:
* 05B = Time Built Code--produced in week B (second week) of month 05 (May)
* 19X = Option Designation for plant use; probably means Black carpet
(see option codes for more)
* 69-3681 = Option Designation for plant use; 69th day of production
for this model year (or possibly 169th or 269th) + a scheduling number of 3681

Fourth line, left to right:
* 191601 = Option Designation for plant use; 91,601st car for that
model and model year
* 02BLK = Option Designation for plant use; option code Z02
(Spyder appearance package) in Black ???


Ste. Therese, Quebec plant (Monzas 1975-1977)

Examine this sample tag (found on or near firewall on most cars):

_______________
/ \
| 01C 106 449 |
| 1HR07 025393 |
| 11L 11U 71V |
\_______________/

Top line, left to right:
* 01C = Time Built Code--produced in week C (third week) of month 01 (Jan)
* 106 = Day of production for this model year
* 449 = Option Designation for plant use (???)

Second line, left to right:
* 1HR07 = Make, carline series, and bodystyle (see VIN decoding)
* 025393 = Production Sequence

Third line, left to right:
* 11L = Lower Body Color (see option codes)
* 11U = Upper Body or Fabric Top Color (see option codes)
* 71V = Trim Combination Number (see option codes)
Clyde.........75 Monza 2+2
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Re: understanding identaplate letters and numbers

Postby monzaaddict » Mon Jun 03, 2019 8:44 am

3871st body built by fisher. Black vinyl interior. Metallic Orange paint. Car was a 4 cyl. Based on hood underside bracing, small manual steering box, 4 cyl mount spacers
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Re: understanding identaplate letters and numbers

Postby mldeolde » Mon Jun 03, 2019 12:37 pm

thanks for the info. very helpful. form base 4cyl car to IMSA street car quite the transition. seeing they trashed the engine ,transmission,differential,front and rear suspension and all the brakes I quess that was the most economical way to go. it has always kind of bugged me that withal thos trick modifacations that they semed to have kept the 4 cyl cars front springs and put in coil spacers to keep the ride height reasonable.
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