Vehicle Identification Number
See VIN decode page

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

Engine Info
Assembly Plant
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
CKN - 402 ci 4 barrel with TH 400 trans
CKR - 402 ci 4 barrel with manual trans
CNI - 350 ci 2 barrel with manual trans
CNJ - 350 ci 4 barrel with manual trans
CNK - 350 ci 4 barrel with Powerglide trans
CNM - 350 ci 2-barrel with Powerglide trans
CNN - 350 ci 2-barrel with TH 350 trans
CRE - 350 ci 4-barrel with TH 350 trans
CRH - 400 ci 2-barrel with TH 350 trans
CRN - 454 ci 4-barrel with TH 400 trans
CZX - 400 ci 2-barrel with manual trans

Rear Axle Info
Axle Prefix Code
CCF - 3.31:1 with Positraction        
CCH - 2.73:1 with Positraction        
CCN - 2.56:1        
CCO - 2.56:1 with Positraction        
CCP - 2.73:1        
CCW - 3.31:1        
CGA - 2.56:1        
CGB - 2.56:1 with Positraction        
CGC - 2.73:1        
CGD - 2.73:1 with Positraction        
CKC - 2.73:1 with Positraction        
CKD - 2.73:1        
CRJ - 2.56:1        
CRK - 2.56:1 with Positraction        
CRU - 3.31:1        
CRV - 3.31:1 with Positraction

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

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

Assembly Month
8 - August
9 - September
0 - October
N - November
D - December            
1 -January            
2 - February            
3 - March            
4 - April            
5 - May            
6 - June            
7 - July

Transmission Info
Turbo Hydra-Matic 400

Model year
70 - 1970 model year

Engine Type
C - 402 engine
R - 454 engine

Date of Build
Three digit Julian date starting with Jan 1, 1969

All other transmissions

Assembly Plant and Transmission Type
B - Cleveland Turbo Hydramatic 350        
C - Cleveland Powerglide        
E - McKinnon Industries Powerglide        
K - McKinnon Industries 3-speed Manual        
P - Muncie 4-speed Manual        
R - Muncie 4-speed Manual        
S - Muncie 3-speed Manual        
Y - Toledo Turbo Hydramatic 350

Year            
0 - 1970 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