Have you seen Bloozebury's Canadian project? He is modifying a Fiero, widening, lowering, changing suspension geometry, fitting a transverse V8. There are many drawings, including a rear suspension that was originally strut and has been considerably altered. His website is:
http://bloozeown.weebly.com/
and there's even more detail on the Dutch Fiero site :
http://www.fiero.nl/forum/Forum3/HTML/000116.html