Good HUD is hard. The problem is the length of the lightpath. I've done some experiments with this, your best bet is to place the screen somewhere on the right hand side and project via a mirror onto the windshield. You'll still have to deal with sunlight reflecting off the mirror into the car and you will need a super bright lightsource to be able to use it in daylight. The best solutions end up in front of the firewall to minimize picture distortion.