Camshaft/Valvespring $350.00
Pre-fabricated Longtube Headers with Y-Pipe and Cats/O.R.P. (Except SLP) $350.00
Catback Exhaust (Includes removing old exhaust) $100.00
Full LS1 Edit Custom Dyno Tune w/ Part Throttle: $450
Those are the prices from TTP in North Jersey but the prices should stay around that area no matter where you go. With all that installed you might want to look at getting it fully dyno tuned also.
P.S. Welcome to the club!
JW