I think the primary differences in sensors are the second O2 sensor and the Crank Position sensor. I've heard of people trying to swap the oil pump for an OBD II piece (the sensor physically mounts it) and installing the geared wheel on the crank pulley. I have not however heard of it working successfully. I'm sure it has but nobody I know has made it work and ended up with an OBD I ECU or check engine lights.