Mallory Ignition 21312, 21313 User Manual

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1964-1972 (All GM A-Bodies) & 1978-1987 (All GM G-Bodies)

INSTALLATION INSTRUCTIONS

LAKEWOOD INDUSTRIES

LAKEWOOD

“TRACTION...ACTION” LIFT BARS

Part Number #21312 / 21313

WORK SAFELY!

For maximum safety, perform this installation on a
clean, level surface and with the engine turned off.
Place blocks or wedges in front of, and behind both
rear wheels to prevent movement in either direction.

CAUTION: To avoid any possibility of bodily injury or
damage to vehicle, do not attempt installation until
you are confident that the vehicle is safely secured
and will not move.

PREPARATION TIPS FOR INSTALLATION

1. Place vehicle on a solid level surface to ensure safe
installation.

2. Place wheel blocks in front of and behind both front
wheels to prevent movement in either direction.

3. Raise rear of vehicle and support axle housing using
approved automotive support stands having adequate
load capacity (6” inside from each control arm).

4. With a paint scraper, scrape all the undercoating
and rust off the inside of the frame and rear end lift
bar mounting areas.

GM LIFT BAR INSTALLATION

1. On a work bench, drive the grease fittings into the
1/4” holes in the front and rear of bars as follows:
Use a 1/4” deep well socket and a small hammer.
Place a small amount of bearing grease on the ball
end of each grease fitting so that the fitting will
temporarily stick to the end of the 1/4” socket.
Place the fitting into the hole, then one at a time,
drive them in.

2. Grease the ends of the front bar bushings and align
the nylon washers over the steel inner bushing. The
grease will hold the washers in place temporarily.
Also grease the inside of the front frame lift bar
mounting brackets.

3. Place each lift bar into front frame brackets , align
bolt holes and insert the correct bolt supplied, from
the inside of the frame. Place self locking nut into
socket with extension then attach through the
outer frame holes.

4. Attach rear lift bar mounting plates as shown. use
the hardware supplied at the stock GM

lower control arm bolt holes. Place proper bolts
through these bolt holes and secure lock washers
and hex nuts. If preferred, thread locking liquid can
be used. Do not tighten fasteners yet.

5. Grease the ends of the rear bar bushings and place
nylon washers over the steel bushings just like in
step 2. Swing lift bars up between rear mounting
plates. Align the bolt holes and insert proper bolts
supplied. Attach lock washers and hex nuts and
tighten all bolts and nuts.

6. The pinion angle must now be checked and
adjusted if necessary. The angle between the drive
shaft and the rear end yoke must be between 4 and
6 degrees down. See pinion angle explanation sheet.
(SEE NUMBERS 1, 2, 3, 4 ON THE NEXT PAGE.)

7. With pinion angle set, tighten all fasteners securely.

8. A hole must be drilled through one of the rear lift
bar brackets (if not already drilled in)and through
(SEE NUMBER 4 ON THE NEXT PAGE.)

GM A-BODY

Small bushing used on the 21312 only

GM A-BODY. 64-72

GM A-BODY

Bolt here if not welding.

LAKEWOOD INDUSTRIES

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the housing brackets on each side. Using a hand
drill with a 1/2” chuck, drill 1/2” holes through the
rear mounting plates then through the factory lower
control arm housing brackets. Spot drill using a
1/4” drill, then change to a 1/4” drill size. Drill through
with the 1/4” drill bit then drill through with a 3/8” drill
bit and last with a 1/2” drill bit. CAUTION: Be very
careful when drilling through that the drill bit does not
grab and whip the drill around out of your hands.

9. Insert short 1/2” bolts, lock washers and nuts then
tighten securely.

10.Grease the four fittings in the bars through the

holes in bottom of bars.

11.If the anti-roll bar is going to be used, it can be

attached to the holes provided in the lift bars.
Place the spacers between the anti-roll bar and lift

bars (if necessary) on each side and use factory
GM bolts and nuts. tighten securely. NOTE: for
drag racing use, we recommend not using the
anti-roll bar.

12.Place car back on the ground and you are ready
to test.

CAUTION: TO USE YOUR LIFT BARS ARMS TO
ADJUST YOUR REAR END PINION ANGLE,
FOLLOW DIRECTIONS BELOW.

1. Remove car from jack stands. now place car upon

blocks or car ramps so that the car weight is on all
(4) wheels, keeping the car level, but making sure
you still have room to work under the car to make
your adjustments.

2. With the car up in the air you will need to check the

pinion angle of the rear end and drive shaft. Read
the attached sheet on setting pinion angle. You will
need to aquire a magnetic protractor (angle finder)
to do this operation.

3. Read this before performing the next operation ! !

Using a magnetic protractor (angle finder) check the
pinion angle. If you can’t obtain the desired 4-6
degree pinion angle, then loosen the 4 lower bolts
and pry between the shock stud and control arm to
adjust angle. Tighten all bolts securely while
checking pinion angle.

4. Do not attempt to drive the car with out securing

the lift bar plate to the axle housing plate welded or
bolted. Center punch and drill starting with 3/16” as
a pilot hole then step up the sizes using 1/4”, 5/16”,
3/8” and finishing with 1/2” for final size. Then
install the 1/2” bolts, lockwashers and nuts and
tighten. (torque to 65 ft lbs.)

5. Remove car from the support stands or car ramps

and place it on the ground. You are now ready to
Rock & Roll!!

PLEASE NOTE

1. Be sure to check the bolts frequently. make sure

they are tight and always stay tight. you can use
thread lock if you wish.

2. Welding is recommendedf (but not required) to

secure the lower plates to the lower axle brackets.

3. These lift bars are legal for use in NHRA stock

eliminator classes as a bolt on application only!
(no welding is allowed).

GM A-BODY

Sway bar holes.

GM G-BODY

2 bolts here if not welding.

Sway bar.

GM G-BODY

2 bolts here if not welding

Sway Bar

Sway Bar spacer bushings