Pontiac firebird 1968 - Page 339

6B-32
1968 PONTIAC SERVICE MANUAL
SERVICE SPECIFICATIONS
CARBURETOR
MODEL
APPLICATION
FLOAT
LEVEL
FLOAT
DROP
PUMP ROD
CHOKE
ROD
IDLE
VENT
VACUUM
BREAK
AIR
VALVE
LOCK-
OUT
DASH-
POT
UN-
LOADER
METERING
ROD
CHOKE
COIL
ROD
Refer
To
Rochester BV
Choke
7028168
250-AT 1-19/32" 1-3/4"
—,
.080" .050"
.160"
—
—,
.230" Adjust-
ment.
Rochester MV
Refer
To
7028075
250-MT
5/16"
—
—
.200" .040"
.290"
— —
.245"
.085"
Choke
7028067 250-MT-A/C
Adjust-
ment.
Rochester 2 GV
Refer
7028060
400-AT
.150" To
7028062
350-AT
9/16" 1-3/4"
1-11/32"
.085"
.150"
.180"
Choke
7028066
400-MT
9/16" 1-3/4"
1-11/32"
.085"
.170"
.180"
Adjust-
7028071
350-MT
.160" ment.
Rochester 4 MV
7028260
250-AT
5/16" .085"
.245"
7028261
250-MT
5/16"
.085" .245"
7028262
400-Pont-AT
.230"
7028263
400-428-MT
.245"
Secon-
7028264
400/400 HO F'Bird AT
.230"
dary
7028265
400-MT
.245"
dary
7028266
350-AT
.230"
7028267
400 HO/428 HO MT
.245"
7028268
400/400 HO AT
428/428 HO AT
1/4"
— 9/32"
.100"
3/8"
.230" .015" .030"
.300"
53/64"
Center
Notch
7028269
350-MT
.245"
7028271
400 HO F'Bird-MT
.245"
7028274
400-Ram Air-AT
.230"
7028275
400 Ram Air-MT
.245"
7028276
400 Ram Air F'Bird AT
.230"
7028277
400 Ram Air F'Bird MT
.245"
Fig. 6B-78 Service Specifications