Removing the radiator will make working on the front of the motor much easier and will give you the opportunity to take it to a radiator shop and get it rodded out. Also check to make sure your fan clutch is operating properly and replace it if it's not. A new thermostat and radiator cap along with new cooling system hoses and you will have pretty much zero-timed your cooling system.

95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes