Like Tom said... I used two 1/2" drive extensions from the radiator/battery tray area.
Breaker bar to get them loose, then an air ratchet to get them off.
The threads are really long at 1/16 turn at a time using a standard ratchet. But it can be done with a standard ratchet... That is what I used the first time.
On the bolt head is a flag, so you do not need a socket/wrench on that side once the nut is broken loose. But as you are removing the nut, you will need to hold the flag with a finger to keep the bolt from turning backward, if you use a standard ratchet.