The 2.6 turbo obviously was able to pass emissions in the vehicles it originally came in, so there's no reason it wouldn't pass in another vehicle provided you swap over any emissions equipment with it as well. This would apply to any engine you choose to swap into your vehicle.

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