anyways, to offer some assitance where others are lacking.
I agree that they are a touch hot. how were they metered? At Long Beach for FD, I try not to use spot metering because lots of times it'll find a darker area and then you end up with a blown image. Luckily, I think most of these could be adjusted in post.
as for camera shake / oof, use a manually selected single AF point. I know the 5DMKII is not great with tracking so try to keep that in the middle of the frame. with that being said, you'll probably need to compose accordingly and try to get the closest part of the car in the center of the image where the AF point is. You can crop into the image a slight bit to get the composition desired if you want.
As for tack sharp, try to match your shutter speed to your focal length (or get close to it). For me at Long Beach, I ND the **** out of the lens to get this done. Doing this also gets the wheel spin you're looking for (good job on that in these shots) Not everything will come out perfectly but hopefully you'll get more consistent results.
Also, the last shot is my favorite. i love those mustangs and especially that color.