The 88 "on the gas - off the gas 'tail wag'"

[Raydar]

I'm three for three, over the years.
If you drive an 88, and the car wants to change lanes when you climb on or get off the gas, tighten the long bolts that go through the lateral/toe links, and the rear knuckles.
I just found that mine were extremely loose. Tightening made all the difference. Car isn't scary any more.
How tight? There are torque specs... A certain lb.ft. reading, plus 90 degrees or some such. I just tighten the crap out of them. They're big bolts. I don't think I'm strong enough to break them. At least I haven't, yet.

[Fierofool]

Use the old farm method.  Tighten til it creaks or breaks.  Whichever comes first. 

After tightening, is it possible that a new alignment might be needed or would it change it that much? 

[Raydar]

Use the old farm method.  Tighten til it creaks or breaks.  Whichever comes first. 

After tightening, is it possible that a new alignment might be needed or would it change it that much?

I think, sitting still, the alignment is going to be what it is. I don't think it's necessary. It's never been mentioned in any of the other threads I've read about this fix.
But I might need to have it checked, anyway. This car has the "lightest" steering of any Fiero I've ever driven, and the wheel isn't quite centered.

[Roger]

I'd check the tranny and engine mounts too.