RWHP Guestimate
It's in the shop right now getting a crate LS6 engine thats rated at 405hp and I am going to have them install the engine, a set of Pacesetter LTs with emissions, a pacesetter 3" Y-Pipe with 2 high flow cats, and a Magnaflow cat-back, and a rebuilt 4L65E, along with 3.73 gears in the back. When I get the car back I'm also going to have my buddy tune if for me who knows quite a lot about tuning and has done a few other Gen 3 engines before.
The thing I want to know is what horsepower should this thing be putting out at the crank and at the wheels. I'm just looking for an educated guess here as mine is going to be around 390rwhp but I'm not sure and want a more educated opinion.

