my engine broke down in my 2002 gt and im buying a crate motor. i have to swap over the intake manifold and headers but the headers are all rusted so i wanna get some headers probably just shorties while i have it out to give it a better exhaust tone. im wondering how often could there be an exhaust leak? im going to be spending enough money on getting it fixed and dont want to keep fixing it. Also would it be worth the shorty headers or not? give me some ideas thanks