[tdangle]

If I remember correctly the way they used to be adjusted was 2.5 to 3.5 degrees down and 1/2 degree to the right I think cars were adjusted to the 2.5 degree down and trucks 3.5 because then when loaded they wouldn't blind the other drivers.

You could use some math and figure out exactly how high the light should be for a given distance. Then you could get them close using a wall. You used to be able to buy a headlight adjustment tool that went on the headlight nubs and then used a level. The entire thing was made of plastic and adjusted for both square and round headlights. I had one at one time but have no idea where it went. I don't remember them being very expensive.

I found this on advanced autoparts website:

Find a level surface and a vertical wall or garage door. Park the vehicle close to the wall and, using the masking tape, mark the low-beams' horizontal centerlines.
Mark the vertical centerlines of each beam and the center of the vehicle with masking tape. Marking the vehicle centerline is helpful to determine side to-side alignment, or lack thereof.
Move the vehicle 25 feet straight backwards. Turn the horizontal-vertical adjusting screws to position the low beam hot spots two inches below and to the right of the taped centerlines.


Adjust high-beam hot spots below the horizontal line and slightly to the inside of both beam centerlines relative to the vehicle centerline.