Unfortunately the engine in there now is a 4 cyl. And the mustang is the 3.8, so neither would be a drop in fit. I got the ranger for basically free, and it gets driven daily with the current engine and 5 speed manual transmission. But has 240,000 miles on it, so eventually it is going to give up. I also have a 4 cylinder perkins diesel that I picked up for $100 that was out of an '84 ranger. That may go into a little rock crawler project. But that's another day.