[Tom76-930]

Hello,
Hoping there might be some tips/tricks to getting CV bolts to back out without rounding out. I'm "nothing is ever easy" guy, so I'm anticipating the worst. Mine are the six internal wrenching hex bolts on a 76 930. Is a Craftsman bit OK, or do I need a higher end bit? Impact wrench or regular ratchet? If they do round out, how ugly is the fix?

Thanks huge, Tom