MSD 7222 7AL-2 Ignition Control Installation - Manual (Page 12)

12 INSTALLATION INSTRUCTIONS
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GM IGNITIONS Wiring with an MSD to GM Wiring Harness and a Timing Control.
Harness PN 8876 - Dual Connector Coil.
Harness PN 8877 - 1996-on GM Vehicles.
GM IGNITIONS GM Large Cap HEI Distributors.
There are three different large cap HEI distributors. To identify which
of the following diagrams fit your specific application, remove the
distributor cap and rotor and locate the ignition module at the base of
the distributor. Count the number of terminals on both ends of the
module and follow the corresponding diagram. GM used 4, 5 and 7-pin
modules in these distributors.
NOTE: Some 5-pin models may experience a hesitation or stall on
deceleration. If this occurs, contact MSD Tech Line for the
required bolt-in diode to correct the problem. MSD Tech Line
(915) 855-7123.
NOTE: The stock rotor button must be replaced with an MSD Low
Restraint Bushing PN 8412.