The Weber is a much simpler carb, has far fewer parts to fail or cause problems, and might give you a small performance boost over what the factory carb is capable of. If you don't have to worry about a visual emissions inspection then that would be my choice.

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