Is a 1988 grand marquis 5.0 engine the same as mustang engine?
No, while both the 1988 Ford Grand Marquis and the 1988 Ford Mustang could use a 5.0L V8, they weren't necessarily the *same* engine. There were variations in components and even some internal differences between the engines used in the two vehicles. While sharing the same basic displacement, they may have had different intake manifolds, carburetors (if not fuel-injected), and other parts to optimize performance for the different applications.