Replacing radiator on early 69 302 car in 1969-70 Technical Forum Posted July 18, 2019 · Report reply On 7/15/2019 at 6:54 PM, barnett468 said: Yes, a true cross flow has horizontal tubes, but that term has been attached to ford rads with the inlet and outlet on opposing corners of the rad, which has been tested by US Radiator and determined to decrease outlet temps by around 5 degrees, which is why I posted earlier that a (Ford) cross flow won't do much to increase cooling over a non cross flow. Cooling systems are far more complicated than most people realize and unfortunately many people buy things they don't need or buy the wrong things etc and end up wasting a lot of money in the process and still end up with an engine that runs hot. One of the best improvements one can do to a Ford rad in particular is have a "multi pass" plate installed. This forces the water thru two sections of the rad before it exits. You know I kept wondering why these types of Ford "Down Flow" radiators were being referred to as Cross Flow. Down Flow ===> vertical tubes, Cross Flow ===> horizontal tubes.