MSD 7AL-3, Ignition Control

PN 7330

Important: Read the instructions before attempting the installation.

Parts Included:

1 - 7AL-3, PN 7330

1 - Parts Bag (wires and connectors)

4 - RPM Modules 3000, 7000, 8000, 9000

4 - Retard Modules 2°, 3°, 4°, 5°, 10°, 15° and 20°

4 - Zero Degree Modules

4 - Vibration Mounts

WARNING: During installation, disconnect the battery cables. When disconnecting the battery,

always remove the Negative cable first and install it last.

Note: The MSD 7AL-3 will retard the ignition timing approximately 4° compared to other MSD Ignitions.

After installation, the timing should always be checked and adjusted at idle and total timing.

COIL RECOMMENDATIONS

The MSD 7AL-3 can be used with a variety of coils, but to receive the best performance, it is

recommended to use an MSD Coil. For drag racing and “short duration” applications, the Pro Power

Coil, PN 8201. For street applications or long duration racing events, the HVC Pro Power Coil, PN

8251 or PN 8261 are recommended. The 7AL-3 may be used with a GM HEI Distributor with an internal

coil, however the Rotor Bushing

must be replaced with an MSD Low Resistance Bushing, PN 8412.

MOUNTING

The 7AL-3 can be mounted under the hood, but should be mounted in a position away from direct

engine heat sources. Use the ignition as a template and mark the location of the mounting holes.

Remove the unit and drill the holes using a 1/4" bit. Install the vibration mounts to the 7AL-3 then

mount the ignition using the supplied lock washers

and nuts.

CYLINDER SELECT

This ignition can be used on 4, 6 (even-fire) or

8-cylinder engines. The ignition is set for 8-cylinder

operation. To program the unit for other engines,

remove the one screw that holds the cover to

reveal two wire loops (Figure 1). Cutting a wire loop

determines the cylinder selection.

ONLINE PRODUCT REGISTRATION: Register your MSD product online. Registering your

product will help if there is ever a warranty issue with your product and helps the MSD R&D

team create new products that you ask for! Go to www.msdperformance.com/registration.

Cylinders Loops to Cut

8

None

6

One

4

Two

Cut loops

Remove cap

Figure 1 Cylinder Programming.