damn bro, 700?!!!! 2 thumbs up to you, and not the peoples' thumb either.... anyway, you may consider trying to work some the following into your workouts:
partial deads
fulld deads off a block (2"-4" would be good)
good mornings & weighted hyperextensions -to strengthen the lower back
work your squat like a mofo and get your weights up. this will help to add strength for deads, especially to the beginning of the move.
weighted pullups are a great way to build forearms and grip strength if you need it. use a 45'er or 2 hung from the belt around your waist and keep the reps low, at about 5-6.
try some of these and let us know how it's going.