The Service Manual says you should replace the bolts. They are dirt cheap from the Dealer and come precoated with Ford Spec Loctite. I just use a 12 point socket an Impact Gun and the special Impact swivel.
It looks like people got the original issues covered (whatever Diesal is; I always thought it was 'diesel' like the fuel). (I am not hip at all, so who knows).
Since Ninjacoupe wisely hit on some safety stuff, I will add another one: One should not use chrome sockets with Impact tools (I see people [not people here- just locals] do it all the time. Not good.
And the chrome can splinter off, leaving sharp edges. if you happen to put your hand on the side of the spinning socket (I do to 'guide' the socket), the sharp edge of the chrome can slice the hand, etc open like butta' [sic].
I have decent impact swivels and I use nothing else (nice to not having binding issues like conventional swivels). If a conventional swivel was used with air tools, sockets could really really fly (as opposed to just really flying with an impact swivel).
i was going to tell you to quit being such a girl & get out there and break those damn bolts loose...
j/k. I think those were the most difficult bolts to remove when we did the 5spd swap. It seemed like getting the damn driveshaft out took the most time.