manhours for front suspension rebuild?

The parts replacement is about 6 hrs, with the right tools. You don't need a lift, but you'll probably miss air tools if you don't have them and you need the torsion bar tool and a press. The time like Joe said is in the details. Degreasing, blasting, painting, the "might as wells" like the brakes, and detailing that stuff, then the alignment. It will much more expensive if you want it to look new too and you want to pay for it.