Does it vibrate at idle sitting still?  Could be your harmonic balancer if it does.  I've seen the centers spun before on factory balancers. 
		
	
		
		
		
		
		
		
			
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				Old  Slow GT
New  Slow GT--> under construction
 Latest Addition:   95 Cobra R, #73, bone stock, ~6100 miles.
			  
		
		
		
		
		
		
	
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