Well on a V6 that never sees the rain using a swivel handle ratchet 10-15 mins is not really an issue if you want to make a race of it. I might even go better than that if I tried.
No need to remove a hood. Hell that is harder than the plugs.
Now the plugs on my old GTP GP were ten times harder than the Fiero. As most transverse engines go the Fiero is easy as long as they are not rusted in and the fear of stripping one.
One trick too is to use a old plug boot that is straight or rubber hose to thread the plugs in and out then snug and loosen with the ratchet.
[This message has been edited by hyperv6 (edited 02-08-2015).]