87 and 89 MkIII parts swap question

[94q45t]

My son's 87 was damaged in a storm and needs a new hatch, rear bumper cover and supports. I found an 89 near twin, in great condiiton, bad engine, good price. Both are non turbos, but the 87 has an automatic while the 89 has a 5 speed. Since I have both complete cars, can anyone tell me if there are any unforseen problems in swapping the 5 speed into the 87?

I expect to have lots of 89 silver/gray Supra parts in a month or so if anyone is interested.