Generally, yes - I just prefer not to.
Next time I get things apart, I'll take some measurements and see if ARP has any part numbers that will work (I'm sure they do - the crank tail is threaded 1/2"-20, and I'm pretty sure the flywheel is 3/8"-16,) and be sure to share the information.
In a pinch, a brace of Grade 8 bolts will serve for holding the clutch together (but a socket head capscrew is preferred over a hex head,) but I'd not suggest replacing a flywheel retaining bolt with anything but a flywheel retaining bolt. They are designed to rather closer tolerances (to minimise the effects of shear loading,) and the head design is not something you'd find down at the local - maybe, just maybe, at Quality Farm & Fleet - but not down at the hardware store.
Take the time to visually inspect the bolts you remove - carefully. Any sign of thread deformation or any other problem you can see means you should toss the bolt in the scrap heap and get a new one. No sense playing around here - losing these bolts can cause all sorts of trouble you don't want!
5-90