I used an 89 from Texas as a donor, my dad used a 92 from Florida. The 89 had a tilt column, but I was able to get an airbag non-tilt column from a 90-92 4 cyl. for free from a body shop that was scrapping it. Very minor differences between the 89 and 92 as far as donor parts. Engines appear identical as far as injection, accessories, etc. I believe the later transmission may be rated stronger, but I used a Tremec anyway. The wiring harness from the 92 has a lot more crap to trim out, such as all the airbag wiring, sensors, and relays. My opinion, I wouldn't hesitate to use an 89, I'd concern myself more with the condition of the parts you need and the price. In retrospect, I'd probably buy a cheaper/crappier donor since I wen IRS and rebuilt or went new on a lot of other things.