MSD 8365 GM HEI Billet Distributor Installation - Manual (Page 5)

INSTALLATION INSTRUCTIONS 5
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1. Remove the existing distributor cap without
disconnecting any of the spark plug wires.
2. With the cap off, crank the engine until the
rotor is aimed at a fixed point on the engine or
firewall. Note this position by making a mark
(Figure 8).
3. Place the distributor cap back on and note
which plug wire the rotor is pointing to. MARK
THE SPARK PLUG WIRES and remove the
distributor cap.
4. Disconnect the wiring from the distributor.
5. Loosen the distributor hold down clamp and
slide the clamp out of the way.
6. Lift the distributor out of the engine. Note that
the rotor rotates as you lift the distributor out.
This is due to the helical cut gear and should
be taken into consideration when installing the
new distributor.
7. Install the gasket and apply a liberal amount of
the supplied lubricant to the distributor gear.
(The supplied O-rings can only be used if
the block has been modified as shown in
Figure 9.)
8. Install the distributor making sure that the
rotor comes to rest pointing at the same
fixed mark. If the distributor will not fully seat
with the rotor pointing to the marked position,
you may need to rotate the oil pump shaft
until the rotor lines up and the distributor fully
seats.
9. Position and tighten the hold down clamp onto
the distributor.
10. Install the distributor cap and spark plug wires
one at a time to ensure correct location.
11. Connect a switched 14-gauge wire from
a 12 volt source to the B+ terminal of the
Distributor Cap (Figure 10).
12. Page 7 shows how to set the rev limiter and
connect the tachometer.
Figure 8 Marking the Rotor Location.
INSTALLING THE DISTRIBUTOR
Figure 9 Modified Block for use with O-Rings.