i also say get the compressors...i jus bought a pair for like $15...but i do alot of suspensions. Better safe then sorry, cuz if one of them fuckers flies off they can do alot of damage to you, or something else they hit.

The front swap will prolly take you like 3 hours or so your first time...maybe more. The rear, maybe 30 mins, since the whole assemble is held in with one bolt...aside from all the three on each side, up top.