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Ok guys let me see if I did this right. Here is the info I pulled off my engine - let me know if my research is correct - Thanks in advance.

Engine Code Stamp - V0520TYZ

Suffix - TYZ

Block Casting Number - 3970010

Partial # - 07F200527

Here is what I came up with - is it correct, (and is there any more info I can get from these numbers?

TYZ - '69 - '77 350 ci, 185 hp truck engine, 4 BM

Flint - 1975 based on the partial #.
 

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Here's what I show for that Suffix

Code Year CID Vehicle HP RPO Trans Carb Comments
TYZ 75 350 Truck 160 LS-9 Manual 4-Brl C 10 & C 20
TYZ 76 350 Truck 165 LS-9 Manual 4-Brl C 10 & C 20
TYZ 77 350 Truck 165 LS-9 Manual 4-Brl C 10 & C 20

Based on that date, it would be the 1975 block.
 

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Its from a 1977 model

C7F200527 is the CON VIN
C - Chevrolet Truck Division
7 - 1977
F - Flint Truck Assembly
200527 - serial number of truck, lat 6 digits
 

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How's that date work with the suffix code being - V0520TYZ?

Tks,
Rich



Its from a 1977 model

C7F200527 is the CON VIN
C - Chevrolet Truck Division
7 - 1977
F - Flint Truck Assembly
200527 - serial number of truck, lat 6 digits
 

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I don't understand your ? Where do you come up with 1975?
Unless you think the 05 means 1975?

V0520TYZ
V - Flint Engine
05 - May
20 - Day of Month
TYZ - suffix aka broadcast code


The model year is in the CON VIN, so its from a 1977 model without a doubt. The 2nd digit in the CON VIN is the model year, 7 is what he has here and thats 1977; 1st is the GM divsion code and 3rd is the assembly plant.
 

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Nevermind. The V05 is month, I was thinking year. Duh!

Rich
 

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The numbers on the pad represent V-Tonwanda 05= May 20= 20th day. you need to get the casting date off the back of the block in order to get the Month, day and year block was cast. Then you can tell how close the casting date and build date are to each other.

Dave
 

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The VIN derivative says it's out of a '77 truck built at Flint Assembly. :thumbsup:
 
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