Well a well designed front engine car would have the roll axis sloping upward in the front to match the centroid axis.

At stock ride height, the Fiero front control arms are parallel adn consequently the front roll center is at ground level.

A couple of people on the Fiero Racing List have had VERY good results from raising the inner lateral link pivots in lowered '88 Fieros. This raises the roll center back up to something like stock or even a little higher.

Really..?? Are stock 88 front upper and lower control arms suposed to be parallel..?? Mine are not. The measurement I have shows 11 deg difference. My crude figuring, puts the front RC roughly 5” off the ground.

Raising the inboard lateral link control points at the rear definitely help keep the RC up off the ground if you just shorten the springs. I changed mine to 1" up, equal lenght, and paralell. To me, the stock unequal lenght is to dificult to tune.

That was for an early car... I thought the '88's were very close to parallel, but wasn't sure about being exactly parallel.

What do you mean "unequal length was hard to tune"?
If I read correctly, you now have your toe links and fixed length lateral links the same length? What difference, if any, did you notice in handling. I was under the impression that GM had made those links unequal length to give the car some good bump-steer (toe in on compression, toe out on extension).

I don't think the pre-88s control arms are parallel either. ( ?? )

Yes, my toe-link and fixed lenght laterial links are both the same lenght. GM did build in bumpsteer. With the unequal leghth links, I find it more difficult to get a nice flat bump steer curve. I personaly like zero at all 4 corners. Handelling is just plain more predictable.