Rare89gtus

i have an 89 gtus with a stock non-turbo motor, i am buying a 89-91 turbo motor with all essensial parts with a matching tranny/clutch/flywheel. I do not want to try to find a match harness, i would like to use and modify the GTUS harness, is this a viable option for me or does anyone have a turbo 2 89-91 turbo computer and harness they want to sell. I would rather just modify my computer and harness to run the motor, please inform me asap. thanks