Radiator Interchange /6 Valiant 65->63?

A '63 and '64 radiator will swap over with no changes necessary but the '65-6 won't. The '65-6 19" radiator will work if you swap bracket(s) as needed like 65 Dartman said but the 22" ones won't fit without more extensive mods. Keep in mind that they made the radiators in manual and automatic versions on the factory ones. The auto type will fit the manual but not the other way around due to no transmission cooler.