I don't know why you'd ever want to waste your time refitting a car from OBD1 to OBD2.
OP, your car was OBD1 from the factory, and has an OBD1 engine installed. Why do you want to switch to OBD2?
1998 BMW 328is Shooting Brake
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild