For the sake of the record at 350 ft /lbs starting from hard snug position, initially pulled up firmly with a 3/4" ratchet drive , then tensioned with a 1" drive tension wrench pulled to 350 ft /lbs tension , the nuts moved from hard snug by a full 1/4 turn of the nut +1/4 " to the final tensioned position .
All surfaces super clean , a little smear of bearing grease. If you could not obtain a tension wrench it would turn out pretty close.
This is consistent with structural friction joint bolting method on high strength bolts. FWIW.