Well, it seems to me that you had a hand in bolting mine to a Camaro flywheel.
I used ARP sbc cam bolts as per some websites. I can hunt down the part number if desired. They come 3 to a card and can be had at any speed shop. One of the guys on the Yahoo list sells flywheel bolts (don't know if they are the same)
You need to have the flywheel machined to the thickness of the Fiero 2.8 one. crank face to clutch side face. There is mention that the 3800 n/a S2 is a slightly difference balance from a s/c. That said, I believe there are flywheels that have been machined and used without a match balance to the original flexplate. Mine was done due to the difference between S1 and S2.
The clutch of choice seems to be the SPEC 3. I believe that any heavy duty clutch may prove suitable. Owner's driving habits may cause trouble unrelated to clutch make. Mine is a Bully (Ottawa Clutch) but was a lot cheaper through a speed shop than direct from the manufacturer. I have heard nasty things about Centerforce and Bully, so it seems to be a crap shoot.
Is Stephane's car a manual?