OBD 2 has things like a sensor that counts the teeth in the flywheel ring gear to determine cylinder power balance or misfire. There are a lot of other OBD2 specific sensor functions that would have to be included in any swap. I am sure it can be done, but it would require some considerable skills by a tech with considerable experience and inventiveness.
Even the post cat second O2 sensor whose purpose is to test the effectiveness of the first sensor and the cat would have to be installed to prevent a CEL.
Basically the pre OBD 2 donor shell would be just that, a shell with everything from the OBD2 donor vehicle fitted to the shell.
regards
Mech
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