I have rebuilt a few fiero steering systems for the pre 88's.
The inner tie rod is threaded to the rack. it will unthread after you grind/remove the dimpled area.
I think I can explain this better...
what you will see:
The inner has two flattened sides of about 1/4 inch in from the rack to inner tie rod end of the inner tie rod. these sides are compressed to keep the inner tie rod from loosening. These spots have to be ground down or pried out from the rack to allow the inner to unthread.
When you remove the outer tie rod from the inner, count the rotations to remove it. Then install it on the new one with the same amount of turns. install the inner on the rack and use vice grips or hammer and punch (a small coal chisel works pretty well) to re-compress the 1/4 inch flattened area. then install the outer back into the spindle. this should still be re-aligned by a shop, but it should be close enough to drive until a shop can re-align it.
I don't know for sure, but I suspect the 88's are similar
[This message has been edited by IFLYR22 (edited 09-26-2007).]