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			This is an original Holley 4490, 4 carburetor for a 1970 Z-28 equipped with an automatic.  
		
		
		
			The GM part number, stamped into the choke horn is 3972120. The date code is 023 (3rd week of February, 1970). Though not perfect, I believe the original plating on this center section is very good, and would look great on someone's early survivor car 1970 Z-28.  |