Cooling issues

I moved from a Champion 22" rad (factory 22" rad car"to a 26" cold case rad and it dropped in. I think It was missing the threaded inserts on the top passenger side so I used a nut on a bolt but it was shocking how easy it was to change to. NOW that extra few inches of rad is NOT going to get air to it unless you cut away at your rad support to open it up. If that being said moving a modern 2 rows of 1.25" tubes is a HUGE improvement over an old stock unit or heck even a several year old 3/4 row aluminum.
Great, thank you!, I also have a champion 26 in my car, with the Ford fan mod, My motor is also built pretty good, nothing crazy but also would be part of the reason. I just reset my dakota last night. although its lowest on temp was like 150 or something, not with key on, I didn't have alot of time to look how to accomplish that but I am curious to see how this works.