I have a 2001 Mustang GT with widened tires, race suspension, is lowered 4 inches, and has an aftermarket exhaust. This car means a lot to me and has been in my life longer than it hasn't. I want to slowly make it into a sleeper. I don't know how to work on engines and don't know what to look for. I' am going to learn to take it apart and such from the maintenance manuals. I know my manifold is blown but I need to know what other parts of my engine to look into. Bottom line is, at 130,000 miles, what should I be looking for in terms of longevity of my engine. What should I look for to keep my engine out of possible future failures?