Spotter's Guide
Hood Bird Guide
Color Guide
1970 Firebird Engines
Engine ID Stamping
UPC Code
Type
Source
Displacement (cubic Inches)
Bore & Stroke
Carb
Comp
HP/RPM
Torque/RPM
VIN
Manual
Automatic
Usage
L-22
Inline 6
Chevrolet
250
3.88 x 3.53
1 bbl
8.5:1
155@4200
235@1600
n/a
ZB
ZG
standard Base
L30
V-8
Pontiac
350
3.88 x 3.75
2 bbl
8.8:1
255@4600
355@2800
n/a
WU
YU
standard Esprit, optional Base
L65
V-8
Pontiac
400
4.12 x 3.75
2 bbl
8.8:1
265@4600
397@2400
n/a
-
XX
optional Esprit
L78
V-8
Pontiac
400
4.12 x 3.75
4 bbl
10.25:1
330@4800
430@3000
n/a
WT
YS
standard Formula 400
L74
V-8
Pontiac
400 Ram Air III
4.12 x 3.75
4 bbl
10.5:1
335@5000
430@3400
n/a
WS
YZ
standard Trans Am, optional Formula
L67
V-8
Pontiac
400 Ram Air IV
4.12 x 3.75
4 bbl
10.75:1
345@5400
430@3700
n/a
WH
XN
optional Trans AM
Close