I use the old 40s and 50s method. My garage floor is flat, but at an angle. I measured the height of the center of the headlights of the car to the floor and the distance between them. Then with the car rolled back as far as the edge of the flat floor, found the center of the car by using the center of the rear view mirror, the center of the hood and the center of the trunk lid, and marked last two with masking tape, then marked that center on the front of the garage (a laser helps, it replaced the old eyeball, and my garage has cabinet doors at the front that are closed for this technique) with tape. Then I transferred the height and distance between the headlights (from above), dived by two and marked that distance each from the center for the left-right points, and had the two points where the high beams "should" shine. The low beams should be lower. Adjust as necessary. The shop manual and Electrical Assembly Manuals have headlight alignment diagrams. Over the years, this method was done successfully on my 65 and 66 Mustangs, plus several "street legal" VW dune buggies and a friend's jeep. It's ball park (It keeps the beams out of the drivers' eyes of on-coming traffic.) Do not attempt this method to satisfy legal requirements. Don't bother to do your fog lamps this way, they "self-adjust" as soon as you hit the first bump in the road.
Jim