You CANNOT use the '86-'87 Integra ecu, you must get the '88-'89 Integra (Both ecu's are still PG7) ecu if you want the ecu from the Integra, which is closer to the PM7 (actual ZC ecu) than the PM6. You could, as sleeper_crx said, just chip the PM6 with the specs of the PM7, but i would just...