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		It could be either. Best to set it up with a degree wheel and not focus on the additional keyways unless needed to make the spec the cam card calls for. 
 
(fordmuscle.com/archives/2007/04/DontBeRetarded/index.php) 
 
(wallaceracing.com/Calculators.htm) 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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