04gto6spd

hey guys I have an 04 gto, I had a cam swap done and a couple boltons. Now im pretty sure my bearings gave out. so I want to swap the ls1 and go for a turbo build with a 5.3l. I want to get around 550rwhp with this build and was wondering how expensive do you think this would be. I want to keep the 5.3 mostly stock, swap out the head gasket for ls9 and a custom grind turbo cam.

my budget is around 7k.