You are bidding on a 1971 Ford Mustang, Torino &  Mercury Cougar Holley carburetor for 429 SCJ engine with automatic transmission.  Carb stamped D1ZF-9510-XA.  List 6128.  Dated 085 or 5th week August 1970.  Front metering block # 6382, rear 5671.   Freshly rebuilt.  Rare find.  If you have any questions please call Kurt.