So I picked this up wednesday. 99 gt with a 04 cobra swap/ engine, trans, and irs. It feels tired and I dont know where to start with it. It also has a somewhat rusted exhaust that does not sound good and needs something better in its place. Any ideas on what to start with and do? Or check for? Would be great. Also, does it look like a legit 04 cobra engine? I thought it would be faster than what it is