converter removed,o2 sensor questions

i recently got my 98 gt and the coverter is cutout and the sensor is just there and the ses light is on,question is,should i just get the dummy plug in,or a dongle and put a sensor on it,what might be pros or cons if any,obviously the dummy is cheaper,thank you

Get a o2 emulator or send the PCM off and have it deleted out.

Yeah, either will work. I have a dummy plug in mine, put it in there before the days of the tuners.....don't really plan on taking it out either.