Stock Flywheel/Bellhousing Safe Under 400HP?
 

Hey guys,
I need to replace the clutch on my car, and after seeing some of the destruction and carnage vids posted on this site I figured I should ask...

At what point do you need an SFI bellhousing? My car is street-driven and has a torquey ZZ4-cammed 355. A ZZ4 was rated at 350hp, 400 ft/lbs (flywheel, not rear-wheel) - my motor probably has less HP because of the TPI, but at least that much torque. I haven't had any issues with the setup so far (other than the old worn clutch slipping) but I just want to be sure it'll be safe. Or, should I get a kevlar trans blanket or something?