Msd 8420 Cap-A-Dapt Kit for Chevy V8 Installation User Manual download pdf

Parts Included:

1 – Adapter Base, PN 8446

1 – Rotor (two pieces), PN 8421

1 – Cap – PN 8408

INSTALLATION

1. Leave the spark plug wires in place and remove the

distributor cap.

2. Before removing the rotor, position it in a way

that its location can be noted. Mark the position

of the rotor tip then remove the rotor (Figure 1).

3. Install the Adapter Base onto the distributor making sure the

key way is aligned properly. Push and rotate the retaining

spring clips until they clamp to the distributor housing.

4. Before installing the rotor base, determine which length

rotor screws are needed for your distributor. Figure 2

shows the two different rotor screw retainers offered

on different MSD distributors.

5. Install the Rotor Base with the correct length screws and Belleville washers to the advance plate.

Install the rotor next and its tip should be pointing to the same mark you made in step 2.

6. Install the distributor cap.

7. Transfer the plug wires one at a time in the proper order from the original distributor cap.

Figure 1 Marking the Position of

the Rotor Tip.

USE 3/4" SCREW

USE 5/8" SCREW

Figure 2 Determining Rotor Screw Length.

ROTOR SCREW

RETAINER

ROTOR SCREW

RETAINING NUT

2 – 5/8” Rotor Screws

2 – 3/4” Rotor Screws

2 – Belleville Washers

M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4

ONLINE PRODUCT REGISTRATION: Register your MSD product online and you’ll be entered

in our monthly 8.5mm Super Conductor Spark Plug Wire give-away! 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.

MSD Cap-A-Dapt

PN 8420

1 2

MSD Cap-A-Dapt 1
Limited Warranty 2

Summary of Contents

Page 1 - MSD Cap-A-Dapt

Parts Included:1 – Adapter Base, PN 84461 – Rotor (two pieces), PN 84211 – Cap – PN 8408INSTALLATION1. Leave the spark plug wires in place and remove

Page 2 - Limited Warranty

Figure 3 Installing the Cap-A-Dapt.Note: If you are swapping from a socket style distributor cap to the Cap-A-Dapt you will need new spark plug termi

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Msd 8420 Cap-A-Dapt Kit for Chevy V8 Installation User Manual

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