A guy I work with is saying that the 2005 Mustang has 2 optional engine packages. First of all, let me state, I didn't believe him, never heard of any of this, and did a little research and could find any info on what he was saying. He said that the new Mustang has a factory option to get one of those new 5.0L Cammer engines with like 420hp, and an option for a 7.5L (460 big block), with something like 600hp...both of these dealer installed. I'm pretty sure this is untrue , but can someone confirm this for me so I don't look like a dumb@ss if I call him out on it. Oh yeah, as for prices: 7.5L option was only like $7500 installed, and the 5.0L was something like $4000 installed.