Right side exhaust manifold for Ford Mustang, Fairlane, Galaxie, Mercury Cougar, Falcon for 289 V8 should also fit a 302 V8 this is an original part not a reproduction. I also have the left side as well. 

Casting part number is C03E 9430B and date code is 2J5. Date code Correct for a 1965 but will fit other years