The only difference (for the 5.2) is the bolt pattern for attaching to the torque converter changed from the asymmetrical pattern to a 90-degree symmetrical pattern. If you have a '96-'01 flexplate, you would also have a matching vintage torque converter as they were used by Chrysler in warranty work. The only other way to use an OBD II-era flexplate on an OBD I-era torque converter is to oval-out the one bolt hole in the converter that doesn't match up. All OBD II flexplates and converters can be identified by the "90" stamp in the castings, indicating they are of the symmetrical 90-degree bolt pattern variety. For the 5.9, there is one additional difference in that the balance weight is on the torque converter for OBD I, but was moved to the flexplate for OBD II.