Using an advance timing light or having the damper marked so advance can be seen. Set base timing at 10* then remove shunt and verify
5.0GL-B/C/D/E Models1
Engine RPM. . . . . . . . . . . . . . . . . . . 89 AKI Fuel
Initial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10°...