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ENGINE CODES

 
 

PONTIAC

 
1974
Code Prefix
1975
Code Prefix
6-250
9
CCR 6-250
9, 17
JT
6-250
9
CCX 6-250
9, 17
JL
6-250
9
CCW V8-260
1, 18
QA
V8-350
1, 16
AA V8-260
1, 18
QD
V8-350
1
WB V8-260
1, 18
QE
V8-350
1
WA V8-260
1, 18
QJ
V8-350
1
YB V8-260
1, 18
TE
V8-350
1
YA V8-260
1, 18
TJ
V8-350
1
YC V8-350
19
RS
V8-350
2, 16
YS V8-350
19
RI
V8-350
1
ZB V8-350
1
YA
V8-350
1
ZA V8-350
1
YB
V8-350
2
WP V8-350
19
RW
V8-350
2
WN V8-350
19
RX
V8-350
2
YP V8-350
19
RN
V8-350
2
YN V8-350
19
RO
V8-350
2
ZP V8-350
2
WN
V8-400
1, 16
AD V8-350
2
YN
V8-400
1, 16
AH V8-350
2
ZP
V8-400
2, 16
AT V8-400
1
YH
V8-400
2, 16
A3 V8-400
2
YT
V8-400
1
YH V8-400
2
ZT
V8-400
1
YJ V8-400
2
YM
V8-400
1
ZH V8-400
2
WT
V8-400
2, 16
WR V8-400
2
YS
V8-400
2
WT V8-455
2
YW
V8-400
1, 16
YF V8-455
2
YU
V8-400
1, 16
YK V8-455
2
ZU
V8-400
2, 16
YL V8-455
2
ZW
V8-400
2, 16
YM V8-455
2
WX
V8-400
2, 16
YZ    
V8-400
2, 16
Y3    
V8-400
2
YT    
V8-400
1, 16
ZD    
V8-400
1, 16
ZJ    
V8-400
1, 16
ZK

Configuration:

1- 2 Bar. Carb

2- 4 Bar. Carb

3- Three 2 Bar. carbs

7- Air condition

8- Super duty engine

9- 1 Bar. Carb

10- Taxi

11- Police , taxi

12- Police

13- A/C Police, taxi

15- Two 4 bar. carbs

16- High energy ignition H.E.I

17- See Chevy for service procedures

18- See Olds for service procedures

19- See Buick for service procedures

V8-400
2, 16
ZS
V8-400
2
ZT
V8-455
2, 16
AW
V8-455
2, 16
A4
V8-455
2, 16
YR
V8-455
2, 16
YW
V8-455
2, 16
YX
V8-455
2, 16
YY
V8-455
2, 16
Y4
V8-455
2, 16
Y6
V8-455
2, 16
Y9
V8-455
2
YU
V8-455
2
ZU
V8-455
2, 16
ZW
V8-455
2, 16
ZX
V8-455
2, 16
Z4
V8-455
2, 16
Z6
V8-455
8
W8
V8-455
8
Y8
 
 
 
The engine code decoder reveals the engine displacement, plate location and configuration.