Mallory Ignition Mallory 75 User Manual

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MALLORY IGNITION

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75 SERIES BILLET HEI DISTRIBUTORS

INSTALLATION INSTRUCTIONS

FORM 1482M (REV. C) 04/05

GENERAL INFORMATION

Mallory 75 Series Distributors are similar to GM HEI
distributors, but with many advantages over the OEM
design, including:

• Billet aluminum housing with ball bearings and/or
self-lubricating bushings to support the centerless
ground 1/2" shaft.

• Fully adjustable mechanical advance (0 – 28°).

• High performance mechanical advance curve
(24° all in @ 3200 rpm).

• Fully adjustable vacuum advance.

• Mallory designed and manufactured HYFIRE module
with a built-in adjustable rev limiter (5000-9500 rpm).

• Indexed housing allows cap to be mounted four
different ways to provide more clearance in tight
engine compartments.

• High performance cap and rotor (with brass
inserts) are manufactured in-house by Mallory from
glass-filled polyester for higher strength and better
electrical properties.

• High performance coil (Part No. 29215, included
in distributors with part numbers ending in “C”)
combined with the Mallory module provide 8500+
rpm capability (rpm may be lower when used with
other coils).

• Available for many V8 engines including Chevy,
Ford, Pontiac, Buick, Olds, Chrysler, and AMC.

INSTALLATION

1. Remove the distributor from the box and check for
any shipping damage.

2. Remove the cap and rotor from the new
distributor and check the gap between the pickup
and the reluctor with feeler gauges. The gap
should be between .015" and .030". If the gap is
wrong, loosen the two pickup screws and adjust
the gap.

3. Adjust the rev limiter (see Page 6 for instructions).
Replace the rotor.

4. If the old distributor is still in the engine, remove
the cap and note which spark plug wire the rotor
is pointing at. Trace that spark plug wire to the
spark plug and determine which cylinder it is.

5. Remove the old distributor.

6. Install the new distributor (without the cap) with
the rotor pointing in approximately the same
direction as the old distributor. If the distributor
will not seat properly, remove the distributor and
use a long screwdriver to rotate the oil pump drive
in the engine.

7. Place the new cap on the new distributor. The cap
will fit four different ways. Determine which of the
four positions works best in your application.

8. Note which cap terminal the rotor is pointing
toward. Run a spark plug wire from that terminal
to the cylinder determined in Step 4.

9. Connect the rest of the spark plug wires to the
new cap in the same order as the old cap.

10. Install the distributor hold-down clamp so that it is
snug, but the distributor can still be rotated with a
little effort.

11. Install the coil onto the cap and connect the wire
harness from the distributor to the coil.

12. If you are replacing an existing HEI distributor, the
wiring harness from the ignition switch can now
be plugged into the coil. If you are replacing
something other than an HEI distributor, a 1/4"
female tab connector can be used to connect the
wire from the ignition switch to the coil.
See Figure 3.

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FIGURE 1

MALLORY 75 SERIES BILLET HEI DISTRIBUTOR

(Olds V8 version shown with Mallory 29215 Coil)

Coil

Adjustable vacuum
advance chamber

Distributor to
coil harness

Shank

Bowl

Set Screws
(Two places)

Ignition switch
wire and tach
wire (if used)
connect here.

Cap
(Can be located in four
different positions for
clearance purposes)

Insert 3/32" allen wrench
to adjust vacuum
advance. Turn clockwise
for more advance,
counterclockwise for
less (does not affect the
mechanical/centrifugal
advance).

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MALLORY IGNITION

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FIGURE 2

FIGURE 3

VIEW WITH CAP AND ROTOR REMOVED

NOTE: Distributor shown rotates counter-clockwise. Components in clockwise
rotation distributors (such as Chevy V8) are mounted in slightly different positions.

Pickup Screws

Rotor Flange

Rotor Flange Bolt

Reluctor

Mallory “HYFIRE”
HEI Module

Adjustable Rev Limiter
(5000 – 9500 RPM)

1/4 Female Tab Connector

To Ignition Switch 12 Volts
(no ballast or resistor wire)

To Tachometer

(if equipped)

14 Gauge or Larger

Pickup
(Gap between pickup
and reluctor should be
.015" – .030")