How do I make 3D HUD?

Hello community! Can't figure how to do 3D health bars for my project. What want to achieve is simple health bar over rival cars that is tracking their location on screen but isn't changing their size no matter the distance off camera. Bars will use sprite animations and formula to display frame to not overcomplex events. Here is rude artistic represantation of what want

Hi do you wish in real 3d or is it pseudo 3d?

If you have real 3D, you can attach a 3D object above the car object and change its width depending on the lives and this object should always be turned to the camera.

But maybe I didn't understand the question.