What year did they switch to overflow bottle radiators?

Sorry I didn't explain that I have the overflow system working all ready. I am looking for a 3 core radiator to replace the 2 core I have out of what I thought was a '74 Duster. Now I looked on the '62 thru '74 radiator part number list and it appears that the only '74 22" came on a /6. I think the donor car was missing the motor. I was hoping to find out what year the small top tanks with overflows started to make it easier to find the 22" 3 core.

Anyone know what year they moved to the overflow system? Maybe guys could state what year they have and if it has a factory overflow system or not. Thanks for the help.