The 64's radiator opening is identical to a 65, its the 64's radiator flange that is 3" wider on slant fan side. They just cheated and put in a smaller core. Hard to find a pic of a survivor as they are all the 65 size now.
No it's not if it is a 6 cylinder car.The 64 has a smaller hole where the radiator fits for 6 cyl cars and the radiator doesn't have that wide side piece like the 6 cyl 65 and 66 have
