MSD 8420 Cap-A-Dapt Kit for Chevy V8 Installation - Manual

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
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MSD Cap-A-Dapt
PN 8420