I don't know that stuffing a SHO motor/tranny will save aggravation in the long run. It's been done before:
And pretty successfully, just needed a fair amount of fabrication.
Now, as for a short-shift for the Tempo, they don't exist (AFAIK
), but there have been some folks who have been able to use an Escort shifter (pre-'91, I think). Look around on Tempo - Topaz Owner Association
or TempoTopaz.com :: Tempo Topaz Car Club of North America
for some more ideas.