Parts Included:

1 - Pro-Billet Distributor

1 - Rotor, PN 8467

1 - Distributor Cap, PN 8433

1 - Wire Retainer

2 - 1.5" Self Tapping Screws

2 - 10-32 x 3/4" Socket Head Screws

Note: The terminals of this Distributor require spark plug style terminals. You may need to change the

terminals and boots of your wires. MSD offers two kits, PN 8849 or PN 8848 that are supplied with

nine boots and terminals.

Note: MSD Gear (PN 8531) is required for replacement due to the .500" diameter shaft.

Note: A replacement Black cap is available as PN 84333.

TIMING FUNCTIONS

Note: The PN 85501 does not have a mechanical advance.

Before continuing with the installation, here are a few definitions you should be aware of:

Initial Timing: This is the base timing (also referred to as idle timing) of the engine before the centrifugal

advance begins.

Centrifugal Advance: The centrifugal (or mechanical) advance mechanism is made up of weights,

springs, advance cams, and an advance stop bushing. The amount and rate of advance that your

distributor is capable of is determined by the centrifugal timing. If you ever wish to lock out the

centrifugal advance, refer to the centrifugal advance section.

Total Timing: This is the total of the initial timing plus the centrifugal advance added together. Example:

10° Initial + 25° centrifugal = 35° Total Timing. (When checking Total timing, disconnect the vacuum

canister and plug the vacuum source.)

Note: MSD Distributors are supplied with the heavy (slow) advance springs installed. This is to prevent

detonation in certain applications. Review the information on pages 2-4 to determine the best

advance curve for your application.

1 - Advance Kit (PN 85561, 8547 only)

1 - Gasket

1 - Tube of Gear Lubricant

2 - O-Rings

WARNING: Before installing the MSD Distributor, disconnect the battery cables. When

disconnecting the battery cables, always remove the Negative (-) cable first

and install it last.

MSD Pro-Billet Chevrolet V8 Distributor

with Slip Collar, PN 85561

Extra Tall, PN 8547

with Locked-Out Timing, PN 85501

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.