Pontiac FIREBIRD 1972 Service Manual page 519

ENGINE-MECHANICAL 6-7
GENERAL DESCRIPTION
B SERIES ENGINES
The 400 cubic inch engine is standard on all Catalina
models. Bonneville models are equipped with a standard
455 2 Bbl. engine, while Grand Ville models use a 455 4
Bbl. engine as standard.
Six different B Series engine-transmission combinations
are available (Fig. 6-1).
G SERIES ENGINES
The Grand Prix model "J" uses the 400 4 Bbl. engine as
standard equipment, and the model "SJ" uses the 455 4
Bbl. engine as standard:
Two different G Series engine-transmission combinations
are available (Fig. 6-1).
A SERIES ENGINES
The standard engine used in the LeMans and LeMans
Sport models is a 250 cubic inch inline overhead valve six
cylinder engine. Luxury models are equipped with the 350
cubic inch 2 Bbl. engine as standard. Models with the
G.T.O. option are equipped with a 400 4 Bbl.,engine as
standard. The 455 4 Bbl. and 455 H.O. engines are also
available with the G.T.O. option.
Sixteen different A Series engine-transmission combina-
tions are available (Fig. 6-1).
F SERIES ENGINES
The F Series standard engine lineup is as follows: Firebird
-
250 cu. in. 6 cylinder; Esprit
-
350 cu in. V-8; Formula
-
350 cu. in. V-8; Trans Am
-
455 cu. in. (H.O.) V-8.
Thirteen different F Series engine-transmission combina-
tions are available (Fig. 6-1).
X SERIES ENGINES
The standard engine in X Series vehicles is the 250 cubic
inch inline six cylinder, with the 307 and 350 cubic inch
2 Bbl. engines available as options.
Six different X Series engine-transmission combinations
are available (Fig. 6-1).
Fig. 6-2 Engine Number and Code Location
(6 Cyl.)
.
Bore and stroke for the four basic engines are: 3 7/8"
x
3 5/8" (250), 3 7/8
x
3 1/4 (307), 3 7/8"
x
3 3/4" (350),
4 l/8"
X
3 3/4" (400), and 4 5/32"
x
4 13/64'' (455).
Fig. 6-3 Engine Number and Code Location
(V-8)