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1968 Pontiac Firebird Convertible

The Firebird convertible entered its second model year featuring the new 350 CID V8 option and aggressive Ram Air performance packages.
223678U158923
ZK: I6
Engine
Convertible
Body
Lordstown, OH
Plant
Muscle Car Era
Era
No factory image on file
1968 Pontiac Firebird

VIN Breakdown

PositionValueDecoded
Series Code 23 Firebird
Year Code 8 1968
Plant Code U Lordstown, OH
Serial Number 158923 Unit #158923

Basic Information

MakePontiac
ModelFirebird
Year1968
Body StyleConvertible
ManufacturerGeneral Motors Corporation
EraMuscle Car Era

Available Engine Options

Engine cannot be determined from VIN. Available engines inferred from series code.

ZK ZK: I6, 250 CID (175 HP)
Horsepower175 HP
Displacement250 CID
Carburetor1BC
ZD ZD: I6, 250 CID (215 HP) - High Output
Horsepower215 HP
Displacement250 CID
Carburetor4BC
WG WG: V8, 350 CID (265 HP)
Horsepower265 HP
Displacement350 CID
Carburetor2BC
WK WK: V8, 350 CID (320 HP) - High Output
Horsepower320 HP
Displacement350 CID
Carburetor4BC
WZ WZ: V8, 400 CID (330 HP)
Horsepower330 HP
Displacement400 CID
Carburetor4BC
WO WO: V8, 400 CID (335 HP)
Horsepower335 HP
Displacement400 CID
Carburetor4BC
WI WI: V8, 400 CID (335 HP)
Horsepower335 HP
Displacement400 CID
Carburetor4BC
ZN ZN: I6, 250 CID (175 HP) - Automatic
Horsepower175 HP
Displacement250 CID
Carburetor1BC
ZE ZE: I6, 250 CID (215 HP) - High Output, Automatic
Horsepower215 HP
Displacement250 CID
Carburetor4BC
YJ YJ: V8, 350 CID (265 HP) - Automatic
Horsepower265 HP
Displacement350 CID
Carburetor2BC
YM YM: V8, 350 CID (320 HP) - High Output, Automatic
Horsepower320 HP
Displacement350 CID
Carburetor4BC
YT YT: V8, 400 CID (330 HP) - Automatic
Horsepower330 HP
Displacement400 CID
Carburetor4BC
YW YW: V8, 400 CID (335 HP) - Automatic
Horsepower335 HP
Displacement400 CID
Carburetor4BC
XN XN: V8, 400 CID (335 HP) - Automatic
Horsepower335 HP
Displacement400 CID
Carburetor4BC

About This Decode

This VIN does not encode the engine, so the engine details shown are representative of the model as built and not VIN-confirmed. (Most pre-1972 GM VINs do not carry an engine code.)

Original Specifications

Bodystyle lifespan1967 through 1969
Headroom front37.0
Headroom rear36.7
Height50.0
Legroom front42.5
Legroom rear29.5
Length188.8
Nameplate origin1967
Wheelbase108.0
Width72.8

Source: Historical automotive documentation (1960-1972)