If you are just changing to a stock LS3 cam, you might as well just keep the L99 cam and save the money. If you are paying for a cam swap there are much better cam choices.
2011 SS IOM Vert. ECS Vortech 14 psi, Water/Meth, Wideband with Firewire to SCT, 2800 stall, LT headers, Drag radials, Drag alignment, Cradle Bushings. Details in Garage. I hack it up, Ted tunes it in.