If the motor is an '89, it's out of a Merkur XR4ti. They are the only 2.3's that were turbo'd that year. '83-'86 Turbocoupes had T3 turbos (and of course SVO's), '87-'88 Turbocoupes had IHI turbos and '8?-'89 Merkurs had T3's. You'll need the entire turbo motor but yes it'll bolt right in. You'll need the computer, LA2-LA3 from an '87-'88 TC, VAM pigtail and most desirable is the large VAM and 35 lb injectors from an '87-'88 TC.
Here's the ultimate website for the conversion...........
http://www.stinger-performance.com/
Also check out
www.turboford.net.