73-87chevytrucks.com
		General Site Info => General Discussion => Topic started by: Stewart G Griffin on January 05, 2014, 08:42:13 am
		
			
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				Has anyone used or know of a decent one wire tach----one that you just hook to one of the spark plug wires?
 
 
 i know how to hook up a tach to a regular hei.  But for this purpose i just need to verify idle rpm.
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				any decent timing light will do this
			
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				ok thanks