Bear in mind that the 64’s radiator opening is only 19 inches wide; 65 and later are 22inches wide and later years are 26 inches wide as well which will play a role in whatever radiator you chose
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.
