At least for the trucks and pickups, the 1935 and 1936 radiators are the same dimensions. Both years had an optional high capacity cooling radiator which added a row of tubes (see the table) on the front side making the radiator thicker towards the front, but all other dimensions are the same for all sides and years. I'm not sure if the high capacity radiator was an option for the pickups, but it's likely.
I've clipped the information from my 1935-1936 truck book which is available through the Early Ford V-8 Club of America.