bad news....the 89 SI has only three motor/trans mounts that are on my parts listings. the 86 has four motor/trans mounts. all the motor mounts for your two cars have completely different part numbers. everything else as far as axles, wheel bearings, and wheel hubs also have different part numbers. now i have never done this swap or seen one done, but i'm more of a dealer guy so i havent been around many swaps. you still may be able to do this with what you have but you'll have to come accross people who know more about swaps and are willing to help. i was just tryin to see if the part numbers would be a perfect match....but i guess that would be too easy. good luck