Chevrolet 10 Series 1968, Service Manual

Page: 700 / 713

CH
EV
R
O
LE
T
TR
U
CK
SE
RV
IC
E
M
AN
UAL
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ROCHESTER
Carburetor M 2G 4MV
Engine Displacement 230 230 250
250 292
292
307 307 307 307 307 307 307 327 327 396
Transmission A ll A ll A ll A ll A ll A ll © © A ll A ll A ll A ll A ll A ll A ll A ll
Part Number
7
0
2
8
0
0
6
7
0
2
8
0
1
0
7
0
2
8
0
0
7
7
0
2
8
0
1
1
o
CO
(M
o
c-
7
0
2
8
0
1
3
7
0
2
8
0
1
5
7
0
2
8
1
0
0
7
0
2
8
1
0
7
7
0
2
8
1
0
6
7
0
2
8
1
1
1
7
0
2
8
1
2
5
7
0
2
8
1
2
7
7
0
2
0
1
0
9
7
0
2
8
2
1
3
7
0
2
8
2
1
1
Float L evel
11/32 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 9/32 3/16
Float Drop
1-3/4 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4
- -
Accelerator Pump 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8 1-1/8 9/32 9/32
Idle Vent .50 .50 .50 .50 .50 .50 1” 1" 3/8 3/8
Fast Idle
Mechanical
1-1/2 Turn
2 Turns
Running 2400 rpm 1800 - 2000 rpm 2400 rpm
Carburetor Choke Rod .150 .150 .150 .150 .150 .150 .100 .100
Choke Vacuum Break .245
.245
Choke Unloader .300 .300
Thermostat Choke Rod
1 Rod Dia.
Interference
A ir Valve Spring 3/8 7/8
Secondary Closing .020 .020
Secondary Opening
.070 .070
Secondary Lockout
.010 .010
Main M eter­
ing Jet
Prim ary .103 .103 .109 .109 .128 .128 .053 .053 .055 .055 .053 .053 .055 .055 .071 .071
Throttle
Bore
P rim ary 1-11/16 1-7/16 1-3/8
Secondary
2-1/4
A ir Valve Dashpot .015 .015
Secondary Metering Rod 27/32 27/32
Carburetor
HOLLEY
4150G
Engine Displacement 366
Transmission
Part Number
(Mfg. Number)
O co
55 ra.
IM
Float
Level
Mechan­
ical
Prim a ry .195"
Secondary .205"
Final
Accelerator Pump
Idle Vent
Fast Idle
Mechanical
Final
Secondary Stop
Main M eter­
ing Jet
Throttle Bore
Prim a ry
Secondary
Prim a ry
Secondary
427
cm
<;
oi ci
.195"
.205"
Sight Plug
.015"
.035 .035
.015"
1800 - 2000
1/2 Turn Open
#66
#68
1-9/16
1-9/16
#66
1-9/16
1-9/16
CO
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