Ignition Timing: Notes

NOTE: Procedures for timing adjustment are for engines equipped with HEI-EST distributors only. All other models are equipped with either C(3)I, DIS or IDI ignition system. Timing on these systems is not adjustable

NOTE: Some engines are equipped with a socket for a magnetic probe timing meter, located 9.5 degrees ATDC. DO NOT use this location for timing with a conventional timing light.