I Need Some Feedback

i like them all, i think having colours for pairs of cars is a good idea

When I was with CAN-AM we all had different highlight colors but the same theme. Someone described our team as the Power Rangers, ever since then I shy away from different colors for different drivers. But if you have say 4 drivers and 2 teams thats a different story. Team 1 has one scheme and team 2 has the same theme but a different highlight color. I will probably update our (NQR) liveries like that since we could have a potential of 5 drivers at a race.

Back on topic, I like the red/black. Might also see how they look with color matching wheels? Red/black try red wheels, green/black try green wheels?

That's pretty much how I see it too.

I like the blue, looks more like a Petty blue to me  . 

The wording on the top of the doors is a little hard to read now for some reason, maybe try an outline around the letters. If you are using photoshop its called stroke, or maybe try a different color. The white letters with the black background worked well on your other designs. But for some reason for me, the black letters are a little harder to read with the blue background. 

Looks good though, for a Ford. 

I am either going to do an outer glow for the banner text or I'm going to change the window banner color from blue to white.  My thought is that if I do change it to white then it will better balance the white at the bottom of the car with the mass of blue that makes up the front end.  You can talk shop with me if you like, I spent 3 years at a professional photography school so I know my way around Photoshop. 

Funny thing when I try to edit my photos in Photoshop I am lost on what to do, but stick a template in front of me and I know exactly what to do, well most of the time.