Dear Mark;
Over "the years" I've reved those (5800 RPM+) many times W/O a flywheel explosion. The clutch bolts/diaphram cover is what goes. We would check them after every run for tightnes etc.
ARP should have the bolts.
If this is a racing safety requirement you'll probably need to make a (2 piece) custom one.
Maybe?? A 1/4" steel floor palte will work too??
Ask your safety people.
Good luck.
PS: The engine will 'blow' before the flywheel, if ballanced properly. :p