"Racing" on the PA turnpike = not a good idea.
Interstate driving is only good for getting from point A to point B using cruise control (set at ~75) in the old luxobarge.
You really don't need an M3 for this trip.
If you want to make things interesting, get on some of the excellent back roads in PA, especially in the hills and mountainous areas.
However, doing that would probably make it a two day trip.
