I charged $1400 for the last turbo I installed at my shop. That was labor only (besides a few small things like steel to make flanges) to make custom headers and weld all the piping, customer tuned himself w/HP Tuners. Actually that price included the header pipes and some of the cold side.
He is currently running 12's, and is very happy with the install...
0-6psi in < 48hrs - Power Adder - Third Generation F-Body Message Boards