i have an actron digital light from sears and want to check timing on 82 200e. i've never used a timing light before. first ? i have is, the manual says to hook a portable tach well my timing light has an inductive pick up clamp that measures rpm is this good enough or does it have to be a separate unit? second is light manual talks about the timing adv. buttons is this something that is only used on engines with vacum adv. dist.? thanks for the help


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