Completely stock and needing updating.
If I had an unlimited Budget. I would opt for a coyote motor and transmission package from Hotrod power source.
As it stands I am looking to get a 400hp/430tq longblock from tristar, A new hd e4od and a rebuilt bw1356 from Monster transmission.
After I get these I will be going with a set of ceramic coated headers and a full stainless exhaust. Possibly flowmaster or borla mufflers