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			Hello, can anyone tell me the transition date from flat bottom to ribbed bottom air cleaners? 
		
		
		
		
		
		
		
		
	
	Thanks Mike  | 
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			#2  
			
			
			
			
			
		 
		
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			Not certain there was one. Flat bottom still used in production as late as October '69.
		 
		
		
		
		
		
		
			
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	Learning more and more about less and less...  | 
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			#3  
			
			
			
			
			
		 
		
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			I owned Dusk Blue SS-350 Camaro VIN #124379N710456 built 11A and it had a Flat Bottom Cowl Air Cleaner assembly. FWIW and it was original to the car to the best of my knowledge. 
		
		
		
		
		
		
		
		
	
	Bill  | 
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			#4  
			
			
			
			
			
		 
		
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			I had another late car built 10E in the first week of November 69 and it had a flat bottom breather as well.
		 
		
		
		
		
		
		
			
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	I like solid lifter cars, big cams and cars w/ 3 pedals in them.  
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