Coilovers install question

[16g-95gsx]

I am about to replace every bushing and control arm in my 4.8is along with swapping the air suspension with a set of BC coilovers. The reason I am doing this is to eliminate the potential failures of the air suspension (89k miles on the clock) whose tightening up the handling of the X5 not necessarily lowering it as I feel it should have ground clearance.

With that in mind, when the rear shocks are replaced do folks keep the rear airbags in place but disconnect them so that they plug holes but provide no spring force? I'll be taking on a good portion of this this weekend but I'd love to hear personal experience on the swap. What torque values do the various nuts and bolts require. I understand I can search them or calculate them individually but it's clearly easier if anyone has this info already. Sway bar endlinks, sway bar bushings, ball joints, control arms, hub to strut bolts, etc will all be redone. I even bought a new shop press just so that I can replace OEM bushings and poly bushings