MSD 8366 GM Late Model HEI V8 Ext Coil Distributor Installation - Manual

Pro-Billet Late Model GM Distributor,
V8-PN 8366*, V6-PN 8367
Parts Included: Replacement Parts:
1 - Distributor V8 Cap - PN 8426
1 - Gear Lubricant V8 Rotor - PN 8427
1- Gasket Gear - PN 8531
Figure 1 Marking the Distributor Location.
These Pro-Billet Distributors are designed as direct replacements for most GM V8 and 4.3L V6 engines
with factory fuel injection systems and a remote, dual connector coil.
REMOVAL
1. Remove the existing distributor cap without
disconnecting any spark plug wires.
2. With the cap off, turn the engine over until the rotor is
aimed at a fixed point on the engine or firewall. Note
this position by making a mark (Figure 1).
3. Place the distributor cap back on and note which
plug wire the rotor is pointing at. Mark the spark plug
wires and remove the cap.
4. Disconnect the two connectors from the distributor’s
ignition module.
5. Loosen the distributor hold-down clamp and slide it
out of the way.
6. Lift the distributor out of the engine. Note that the rotor
rotates as you lift it out. This is due to the helical cut
gear and should be taken into consideration when
installing the new distributor.
INSTALLATION
Note: There are two O-Ring grooves on the housing. The supplied O-rings can only be used if the
block has been modified as shown in Figure 2.
1. Remove the cap from the MSD distributor. Install the new gasket on the housing.
2. Apply a liberal amount of the supplied break-in lubricant to the distributor gear.
3. Install the distributor making sure that the rotor comes to rest at the fixed mark. If the distributor
will not fully seat you may need to rotate the oil pump shaft.
4. With the rotor in the correct position and the distributor fully seated, install the distributor clamp
and tighten it.
5. Connect the two wiring harnesses.
WARNING: During installation disconnect the battery cables. When disconnecting the
battery, always remove the negative cable first and install it last.
* The PN 8366, V8 Distributor is U.L. approved for marine applications.
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