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'68 Drivetrain ID Number Information

1968 Engine Identification Codes
Code Cyl. Disp. H.P. C.R. Trans. Carb. Description Qty. Built Location
WC 8 350 265 9.2:1 Man. 2 BC Firebird 350 1850
Engine Identification
V-8: Find code stamped on the block in front of the right bank of cylinders.
6-Cylinder: Find code stamped on cylinder head contact surface of the block behind the oil filler pipe.

123456 = Production Number
WC = Engine Code

VIN Identification
V-8: Stamped on the right of the timing chain cover.
6-Cylinder: Stamped on the right rear lower side.

(i.e. 2L8100001)
WK 8 350 320 10.5:1 Man. 4 BC Firebird 350 H.O. 3784
WI 8 400 335 10.75:1 Man. 4 BC Firebird 400 Ram Air I 321
WQ 8 400 335 10.75:1 Man. 4 BC Firebird 400 H.O. 1415
WU 8 400 340 10.75:1 Man. 4 BC Firebird 400 Ram Air II 98
WZ* 8 400 330 10.75:1 Man. 4 BC Firebird 400 7563
XN 8 400 335 10.75:1 Auto. 4 BC Firebird 400 Ram Air I 92
XT 8 400 340 10.75:1 Auto. 4 BC Firebird 400 Ram Air II 12
YJ 8 350 265 9.2:1 Auto. 2 BC Firebird 350 50006
YM 8 350 320 10.5:1 Auto. 4 BC Firebird 350 H.O. 2638
YT 8 400 330 10.75:1 Auto. 4 BC Firebird 400 11151
YW* 8 400 335 10.75:1 Auto. 4 BC Firebird 400 H.O. 684
ZD 6 250 215 10.5:1 Man. 4 BC Firebird Sprint 5609 (1)
ZE 6 250 215 10.5:1 Auto. 4 BC Firebird Sprint 1850 (1)
ZK 6 250 175 9.0:1 Man. 1 BC Firebird Standard 13586 (1)
ZN 6 250 175 9.0:1 Auto. 1 BC Firebird Standard 50549 (1)
(1) Includes Tempest production
(*) Conflicting information for these codes.




Transmission Identification Codes
Code Description Engine Comments Location
DB* 3 Speed Dearborn Manual - Heavy Duty (View)
DD* 3 Speed Dearborn Manual - V-8 (Floor Shift) (View)
FF 4 Speed Muncie Manual - V-8 (Floor Shift) (View)
FH 4 Speed Saginaw Manual 250 6 Cyl. (Floor Shift) (View)
FK 3 Speed Saginaw Manual 250 6 Cyl. (Floor Shift) (View)
FX 4 Speed Muncie Manual - Close Ratio (Floor Shift) (View)
FY 3 Speed Saginaw Manual 250 6 Cyl. (Column Shift) (View)
LF 2-Speed Automatic 250 6 Cyl. - 1 BC, W/O AC (View)
LG 2-Speed Automatic 250 Sprint - 4 BC, W/O AC (View)
LH 2-Speed Automatic 250 6 Cyl. - 1 BC, W/AC (View)
MA 2-Speed Automatic 350 350 - 2 BC, W/O AC (View)
MB 2-Speed Automatic 350 H.O. - N.A. W/AC (View)
MC 2-Speed Automatic 350 350 and 350 H.O. - W/AC (View)
PQ Turbo Hydra-Matic 400 400 400 Ram Air - 4 BC (View)
PX Turbo Hydra-Matic 400 400 400 and 400 H.O. - 4 BC, W/O Ram Air and AC (View)
PY Turbo Hydra-Matic 400 400 400 and 400 H.O. - 4 BC, W/Air, W/O Ram Air (View)
RJ 3 Speed Saginaw Manual 350 350 and 350 H.O. (Column Shift) (View)
RQ* Hydra-Matic 400 Ram Air Only (View)
(*) Conflicting Information for these codes.




Axle Identification Codes
Ratio Std. Axle
Code		 Safe-T-Track
Axle		 Sales Code
Col. 37
2.56 (41:16) XB ZB C
2.78 (39:14) XC ZC D
2.93 (41:14) XD ZD E
3.08 (40:13) XE ZE F
3.23 (42:13) XF ZF G
3.36 (37:11) XG ZM H
3.55 (39:11) XH ZN K
3.90 (39:10) - ZP P
4.33 (39:9) - ZR S




Carburetor Identification Codes
Code Type Engine Comments
7028065* Rochester Monojet 250 Manual (Early)
7028075* Rochester Monojet 250 Manual (Late)
7028067 Rochester Monojet 250 Manual w/A.C.
7028261 Rochester 4M Quadrajet 250 Sprint Manual
7028260 Rochester 4M Quadrajet 250 Sprint Automatic
7028071 Rochester 2GV 350 Manual
7028062 Rochester 2GV 350 Automatic
7028269 Rochester 4M Quadrajet 350 H.O. Manual
7028266 Rochester 4M Quadrajet 350 H.O. Automatic
7028066 Rochester 2GV 400 Manual
7028060 Rochester 2GV 400 Automatic
7028265 Rochester 4M Quadrajet 400 Manual
7028264 Rochester 4M Quadrajet 400 Automatic
7028271 Rochester 4M Quadrajet 400 H.O. Manual
7028264 Rochester 4M Quadrajet 400 H.O. Automatic
7028277 Rochester 4M Quadrajet 400 Ram Air I Manual
7028276 Rochester 4M Quadrajet 400 Ram Air I Automatic
7028273   400 Ram Air II Manual
7028270   400 Ram Air II Automatic
*Early production units use model number 7028065 which incorporates a different metering rod setting as noted on page 6B-15 in the '68 Pontiac Service Manual




Distributor Identification Codes
Code Engine Comments
1110430 250 Man. or Auto.
1110431 Sprint Man. or Auto.
1111281 350 Man. or Auto.
1111447 350 HO Man.
1111282 350 H.O. Auto.
1111449 400
400 H.O.
Ram Air		 Man.
1111270 400
400 H.O.
Ram Air		 Auto.
1111448 Ram Air II Man.
1111300 Ram Air II Auto.




Head Casting Identification Codes
Code Engine Comments
17 350  
18 350 HO  
16 400  
31 400 Ram Air I
R(96)A 400 Ram Air II
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