I have a 1954 Cadillac with an older rebuild on the engine and the stock radiator rotted a few years ago and run a 7 lb. radiator cap. Also have the stock pulley driven fan and an additional pusher fan on the front of the radiator. The car temperature is OK in most situations but when I need to do extended climbing as I do in the California Sierra foothills to get to some shows and fun spots, it is likely to overheat. Usually a few stops to hose down the raditor suffice to get me where I am going but I would like to avoid this. At this point, I am comtemplating a modified radiator. My stock radiator is a 3 row. As I see it, my options are a new high efficiency 3 row core or a new high efficiency 4 row. The 4 row would take enough modification to the radiator area that I would prefer to go with the 3 row. I am trying to determine if the high efficiency 3 row with a 10 lb. cap will solve my problem or if I should go with the 4 row and/or other possible modifications to be sure that I get the desired effect (no over heating). Thanks for any thoughts.