I've been putting clutches in Fieros, as well as other vehicles for the past 20 years, each time the flywheel gets resurfaced. Have never shimmed a flywheel yet, and never any problems. Some of these flywheels were resurfaced 3 and 4 times.
Have the flywheel resurfaced, put it in, and think nothing of it. If you feel you need to shim the flywheel to have proper clutch action, you are simply covering up a different problem.
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[This message has been edited by jelly2m8 (edited 03-26-2002).]