depending on the condition of the 20 studs holding the wheel together, it may pay to chase the threads, 5/8-16 I believe.
I used an XB-550 bead breaker and soapy water, although I don't think the bead breaker is necessary as there is technically no bead to break, it just makes it easier to separate after sitting on there ~10 years.
After separating the front bead and removing the front of the wheel, it's nice to have a block of wood ready to catch the studs from hitting the ground when you flip the wheel over.
I used a 2" ratchet strap to compress the beadlock and replaced it with a 1" for better clearance before taking it out of the wheel, soapy water helps make everything easier
New o-rings may not be necessary, but in my experience it saves time if you have to pull the assembly back apart.
A 1" impact will make the job so much faster, but a torque multiplier will work as well. I believe the gun (with 1/2" hose feeding it) will get the bolts tighter and more consistent based on limited personal experience