A Custom Aluminum Radiator for a Ranger swap has always been an issue. Be sure to look for a Ford style which has the upper inlet on the Passanger side and lower outlet on the Drivers side.You can find a Titan Racing Aluminum one , 3" x 19" x 28", 2 row, with a heat exchanger for $256.49, but it wont fit. My 1993 std.Ranger (Assuming your 4 x 4 has the same body to frame height) also needs a 15" max.height to fit above the frame rails and below the top mounting rail, so I can tuck in under. The width needs less than 27" unless I do some torch work. The shortest height I have found available so far is Griffin/ Titan 16" x 28" x 3" Aluminum Ford unit @ $194.99. I found the cheapest price at Lefthander Chassis. But ,These dont have heat exchangers for an Automatic.I think a 19" x 22" Ford style may work better, it will fit between the frame rail, but I need one for an automatic. Ebay has a Custom all Aluminum v-8 swap radiator for $280.00, less tranny cooler, which is similiar to James duff or others. Ford made a 4.0 Super cooling radiator for the Ranger which bolts in and has a 2" core for extra cooling.I dont know if this will support a 350HP and up engine or not.
I was wondering what type of Transmission you were going to use?
Do you plan on using a stand alone tranny cooler?