Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. | 
	
| 
	 | 
| 
		 
			 
			#1  
			
			
			
			
			
		 
		
	 | 
|||
		
		
  | 
|||
| 
		
	
		
		
			
			 
			
			This is the left.  
		
		
		
			   | 
| 
		 
			 
			#2  
			
			
			
			
			
		 
		
	 | 
|||
		
		
  | 
|||
| 
		
	
		
		
			
			 
			
			They both could be GM, because they used both kinds of thread inserts. Left is GM, right is ?? maybe GM 
		
		
		
		
		
		
			
				__________________ 
		
		
		
		
		
	
	67 Z28, 67 RS/SS 396 Canadian, 73 Camaro Z28/LT Carolina Blue  | 
| 
		 
			 
			#3  
			
			
			
			
			
		 
		
	 | 
|||
		
		
  | 
|||
| 
		
	
		
		
			
			 
			
			resto4u, thanks for the help.  I figured the left was GM because it was so much heavier, but was not sure. 
		
		
		
		
		
		
		
		
	
	The reason I asked this was because the left fits so well with the grill and fender. The right fits like crap so I'm looking for another extension. (And now I realize that square hole is where I thread insert popped out)  | 
![]()  | 
	
	
		
  | 
	
		
  |