MSD 8478 Ford 351W Street Pro-Billet Installation - Manual (Page 4)

4 INSTALLATION INSTRUCTIONS
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• 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
Figure 5 Advance Stop Bushing Chart.
Figure 6 Changing the Advance Stop Bushing.
Figure 7 Removing the Retaining Sleeve.
SELECTING THE ADVANCE STOP BUSHING
Three different advance stop bushings are supplied in the distributor kit. The distributor comes with
a Blue (21°) bushing already installed. If a different amount of centrifugal advance is desired, follow
the next procedure to change the bushings. The chart in Figure 5 gives the size and approximate
degrees for the corresponding bushings.
BUSHING SIZE APPROXIMATE CRANKSHAFT
DEGREES
Red-Smallest 28
Silver 25
Blue 21
Black-Largest 18
CHANGING THE ADVANCE STOP BUSHINGS
1. Remove the distributor cap and rotor.
2. Remove the locknut and washer on the bottom
of the advance assembly (Figure 6).
3. Remove the bushing and install the new one.
Install the washer and locknut.
LOCKING OUT THE CENTRIFUGAL
ADVANCE
1. Remove the cap and rotor.
2. Remove the advance springs, weights and
the advance stop bushing from the
advance assembly.
3. Remove the roll-pin from the shaft and slide
the retaining sleeve down. It should not be
necessary to remove the gear (Figure 7).
4. Slide the shaft two inches out of the
housing.
5. Rotate the shaft 180° and insert the
advance stop bushing pin into the small
hole on the advance plate (Figure 8).
6. Install the locknut and washer to the
advance stop bushing pin.
7. Install the retaining sleeve and roll-pin.