I got O2 block offs in my 97 lincoln truck, basicaly they are pre programed boxes that just plug into the harness instead of an O2 sensor, I got them off ebay for like 80 bucks about a year ago. truck runs better with whatever program they have them set at, still havnt gotten around to building my exhaust (no cats dual 2.5 out) but that takes money ....and I have none...cheers