Need a little help. I just bought a GSR from the local auction and took delivery this weekend. I had to pull the gsr head from the block, becuase the block had to be destroyed (police order). The car is a 97, but im sure, actually positive, this is not the orginal motor. How can I tell on the head if it is a OBD1 or II. As a note, the car did not have the comuter either, or I would look there first. Thanks alot!