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8
GROUPS 1-2-3
one piece.
1.
Remove
the
outlet
pipe
front
and rear
hanger bracket
clamps.
2. Remove
the
inlet
extension pipe
to
muffler
flange
retaining
bolts.
Remove
the
flange
gasket
and
the
muffler and outlet pipe assembly.
3. Clean
the
muffler and
inlet
pipe
extension
flanges. Position
the
muffler
flange
and a new gasket on
the
inlet
extension pipe
flange. Install
the
re
taining
bolts
and nuts.
4. Install
the
outlet
pipe
clamps
and
align
the
exhaust
system;
then,
torque the
clamp bolts
and
muffler
flange bolts
to
specifications.
5.
Check
the
system
for leaks.
Muffler Inlet
Extension
Pipe
Single Exhaust
1.
Remove
the
flange bolts from
both flanges
of
the
inlet
extension
pipe.
Remove
the
clamp
from
the
extension pipe
hanger bracket.
2.
Pry
the
muffler
toward the
right
side of
the
car and
remove
the
inlet
extension pipe and
the
flange
gaskets.
3. Clean
the
mating
surfaces
of
the
mounting
flanges;
then,
position
the
inlet
extension pipe on
the
inlet
pipe
and
muffler
flanges. Insert
a
new
gasket
between
the
front
and
the
rear
flanges. Install
the
mounting
bolts
and nuts.
4. Install
the
inlet
extension
pipe
hanger bracket
clamp.
Torque
the
flange bolts
and
the
hanger clamp
bolt
to
specifications.
5. Check
the
system
for leaks.
GROUP 2-IGNITION SYSTEM
The
1963
maintenance
recom
mendations are
in
Group
12
and
the
1963
specifications
are
in
Group
13
of
this 'manual.
The ignition
system
service
pro
cedures
outlined
in
the
1962
Shop
Manual apply
to the
1963
Thunder
bird. Refer
to
Group
2
of
the
1962
manual
for
the
recommended
serv
ice
procedures.
GROUP 3-FUEL SYSTEM
The
1963
maintenance
recom
mendations are
in
Group
12
and
the
1963
specifications are
in
Group
13
of
this
manual.
All
the
service procedures outlined
in
Group
3
of
the
1962
Shop
Man
ual
remain
the
same
for
the
1963
390
4-V
engine
series
except as
de
scribed
herein
(Ford 4-V
carburet
or).
Service
procedures
for
the
1963
High Performance
390 6-V
engine
series
(three
Holley
dual
carburet
ors)
are
included in
this
supplement.
FORD 4-BARREL CARBURETOR
OPERATION
The
carburetor
incorporates
the
following
changes:
1. A
magnet and
bracket assembly
was
added
to the
front
wall
of
the
carburetor
air
horn
to
entrap
the
choke
plate
in
the
closed
position
and
increase
the
force
holding
the
choke
plate closed
during
cold engine
starting.
2. A lower
torque
rate choke
hous
ing
spring
has been incorporated
to
reduce
the
forces
tending
to
close
the
choke
plate
after
the
engine
has
started,
thereby
minimizing
the ten
dency
of
the
carburetor
to
over-
choke
the
engine and cause
"loading".
3. An
external
vent
opening has
been
added
to
the
secondary
fuel
bowl
cover
to
provide an escape
for
the
highly
volatile
fuel
vapors,
there
by
reducing
the
possibility
of
flooding
the
intake
system
during
a
hot
soak
period.
4. Standpipe
pitot
tubes
were
added
to
the
secondary
fuel
bowl
internal
vent
openings
to
raise
the
level
of
the
internal
vent
openings
above
the
external
vent
openings.
This
provides
the
necessary
pressure
differential
for
proper
evacuation of
the
gaseous
vapors
through the
ex
ternal
vent
during
a
hot
soak
period.
5.
Two baffles have been
added
in
the
internal fuel
equalizer
passage
between
the
primary
and
secondary
fuel bowls
to
permit proper
control
of
the
metering forces
within
each
fuel
bowl,
since
these
forces
were
thrown
out
of
balance
by
the
addi
tion
of
the
secondary fuel bowl
ex
ternal
vent.
6. The
calibration of
the
secondary
section of
the
carburetor was
revised
to
compensate
for
the
reduction
in
the
metering
forces.
Refer
to
the
specifications
for
the
proper
metering
jets.
IN-CHASSIS ADJUSTMENT
Automatic
Choke. Use
the
follow
ing
procedure
to
adjust
the
magnet
and
bracket
assembly:
1. Rotate
the
choke
thermostat
coil
housing
90
in
the
"rich"
direc
tion
(counterclockwise).
2. Adjust
the
bellcrank
lever,
if
necessary,
to
obtain
0.050 inch be
tween
the
top
edge
of
the
fast idle
cam
and
the
cast
stop
boss
on
the
rear of
the
choke
housing.
3. Place
a
0.010-inch
feeler
gauge
between
the
top
rear straight edge of
the
choke
plate
and
the
air
horn
casting.
4. Loosen
the
attaching
screws
and
adjust
the
magnet
and
bracket
as
sembly
so
that
it just
contacts
the
choke
plate.
Tighten
the
attaching
screws
and remove
the
feeler
gauge.
Set
the
choke
thermostat
coil
hous
ing
to
the
proper
index
mark.
All
other
procedures
for adjusting
the
automatic choke are
the
same
as out
lined in Part 3-1
of
the
1962 Thun
derbird
Shop
Manual.
Fuel Level
Float Adjustment. On
carburetors
equipped
with
Viton-
tipped
fuel
inlet
needles,
the
dry
float
fuel level
settings should
be
used
as
a
guide
only,
and
a
final
check
and adjustment of
the
wet
fuel level
should
be
made as
follows:
1. Operate
the
engine
for
30
minutes at
1200
rpm
to
normalize
engine
temperatures,
and
place
ve
hicle
on
a
flat
surface
as near
level
as possible.
Stop
the
engine.
2. Remove
the
air cleaner
assembly,
carburetor
air
horn
assembly,
and
gasket.
3.
Temporarily
place
the
air
horn
gasket
in
position on
the
carburetor
main
body
and start
the
engine.
Let
the
engine
idle for
several
minutes;
then
remove
the
air
horn
gasket.
4. While
the
engine
is
idling,
use a
standard
depth
scale
to
measure
the
vertical
distance from
the
top
ma-
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