I don't know a lot about air conditioning because I've never had a collector car that had it- but that A/C system looks like a newer unit, not something that would have been dealer installed in 1966?
		 
		
		
		
		
		
		
			
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				69 Chevelle SS L88 "Day-2" Lemans Blue 
69 Chevelle SS L34 postsedan project-Azure Turquoise
			 
		
		
		
		
		
	
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