FORM INST85551M 12/09
INSTALLATION INSTRUCTIONS
PROMASTER
®
SERIES
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING.
You should always disconnect the battery, negative lead first, before working on the ignition system. When you are
done reconnect the battery installing the negative lead first.
Included with the distributor:
1 – Machined Chevy V8 Distributor
1 - Rotor,
1 - Distributor Cap
1 - Wire Retainer
2 - 1.5" Self Tapping Screws
1 - Advance Kit
1 - Gasket
1 - Tube of Gear Lubricant
2 - O-Rings
1 - Vacuum Advance Lock-Out Kit (if equipped with
vacuum advance)
HOW TO INSTALL THE DISTRIBUTOR
1. If the distributor to be replaced has not already been
removed from the engine, remove its cap. Do not
remove the spark plug wires at this time.
2. Crank the engine slowly until the rotor blade aims at
a fixed point on the engine or firewall. Note this point
for future reference.
3. Unplug all external connectors coming from the
distributor.
4. Now put the existing cap back on and note and mark
which spark plug wire the rotor (blade) is pointing at.
Then number the wires according to cylinder and
remove the wires. If in doubt you can leave the wires
connected to the old cap and transfer them to the
new cap and distributor later in the process (see
point # 9).
5. Loosen and remove the distributor hold-down bolt
and clamp. Lift the old distributor out. At this point
the rotor may spin and move from its position. This
is because of the distributor gear.
6. Lower the new distributor into position. The rotor
should be aimed at the same fixed point as was the
rotor from the old distributor. After the new distributor
has been lowered into place, you may find that it
hasn't seated firmly against the intake manifold. This
indicates that the lower end of the distributor shaft is
not properly aligned with the oil pump drive rod. Do
not attempt to force the distributor into position.
7. Install the gasket using plenty of the supplied lubricant.
8. Reinstall the hold-down clamp and thread the bolt
just enough to exert a very slight pressure against the
distributor. If the distributor was not firmly seated,
manually rotate the engine until the distributor drops
down into place.
9. With the distributor properly seated, tighten the hold-
down bolt just enough so that the distributor is held
in place, but can still be rotated with a little effort.
10. Remove the plug wires one at a time from the old
cap and install them in the corresponding positions
of the new cap. After all wires have been transferred,
verify that the wire in the terminal post that is aligned
with the rotor leads to number one cylinder. If you
are unsure of cylinder number position or firing
order, this information can be found in the service
manual that covers your particular engine. Put on
the distributor cap.
11. Reconnect the wiring lead from the distributor to the
ignition switch. At this time you can begin timing.
MALLORY TECHNICAL SUPPORT
(216) 688-8300
1
ADVANCE BUSHINGS
There are 3 different advance bushings included in
the hardware package. The distributor comes with a
21º bushing already installed. If a different degree of
advance is desired, follow the procedures to change
the bushings.
BUSHING SIZE
HOW TO SET UP THE VACUUM ADVANCE
LOCK OUT ON THE #8360M AND #8361M
DISTRIBUTORS
If you do not want to use the vacuum advance canister
of the has supplied a lockout mechanism.
1. Remove the two Allen head screws that hold the
advance canister.
2. Remove the snap ring that holds the magnetic pickup
assembly in place.
28
O
25
O
21
O
18
O
3. Gently lift up on the magnetic pickup plate and slide
the vacuum canister out.
HOW TO SET UP THE ADVANCE BUSHINGS
• Take off the locknut and washer at the bottom of the
advance assembly at the bottom of the bushing pin.
• The bushing will slide off.
• Select the new bushing and install.
• Install the washer and locknut.
4. Install the Lockout Plate in place of the canister.
Install the two retaining screws.
5. Install the supplied screw and washer through the
Lockout and tighten.
6. It is important to make sure the pickup plate is parallel
with the housing of the distributor. If it is cocked or
slanted, the paddles of the reluctor may contact the
pickup. Check the clearance by rotating the distributor
shaft. If necessary, use the supplied shims under the
Lockout hold-down to correctly position the pickup
plate.
HOW TO SET UP THE MECHANICAL
ADVANCE LOCK OUT
1. Remove the springs, weights and the advance stop
bushing from the advance assembly.
2. Remove the roll-pin and gear at the bottom of the
distributor.
3. Lift the shaft at least two inches out of the housing,
but do not remove the shaft.
4. Turn the shaft 180º so the bushing pin slides into the
small hole on the advance plate.
5. Put the locknut and washer back onto the advance
bushing pin, which locks the advance in place.
6. Install the drive gear and roll-pin.
NOTE: IF NO SHIMS WERE REQUIRED, USE ONE BENEATH THE
WASHER OF THE LOCK-OUT HOLD DOWN SCREW.
NOTE: DO NOT FORGET TO PLUG THE ORIGINAL VACUUM
ADVANCE HOSE.
HOW TO WIRE THE READY-TO-RUN #8360M
DISTRIBUTOR
Red lead to coil (+) positive
Orange lead to coil (-) negative
Black lead with the larger ring terminal to engine ground.
NOTE: WHEN INSTALLING A HIGH PERFORMANCE IGNITION
SYSTEM WITH THIS DISTRIBUTOR, PLEASE REFER TO THE
INSTRUCTIONS THAT COME WITH THE IGNITION CONTROL
BOX. THIS DISTRIBUTOR HAS THE CORRECT COLOR CODE.
MALLORY IS A DIVISION OF PRESTOLITE PERFORMANCE
10601 MEMPHIS AVE. #12, CLEVELAND, OH 44144
216.688.8300 FAX 216.688.8306
FORM INST85551M 12/09
Printed in U.S.A.
2
MALLORY IGNITION
www.malloryperformance.com
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