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I think that's a typo since he got it right in the title.
You'd just need a 88-91 transmission, 88-91 motor mount, 88-91 axles, etc. As far as the wiring goes, the easiest way is to get a MPFI harness and swap it on there a long with a 88-91 MPFI distributor or a OBD0/1 distributor adapter harness. You can run a PM6 or get an OBD1 conversion harness and run a OBD1 ECU/P06.