I would not install chambered on a 69 Z28 as been stated  you lose HP and it sounds like crap. One of my Z's has it listed on the WS so what's on the car is a Gardner system.  
 
I sold a 69 Z years ago and the new owner insisted that I install a standard cross flow system prior to purchasing. 
 
Big block don't sound as obnoxious as small blocks!!
		 
		
		
		
		
		
		
			
				__________________ 
				Steve Shauger 
The Supercar Registry 
www.yenko.net
 
Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website: 
 www.vintagecertification.com
			 
		
		
		
		
		
	
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