The old round headlight bulbs have 3 nubs on them that a headlight aiming gizmo aligns with, then you adjust to make the level bulb centered and the crosshairs lined up. I don't even think you need to turn the lights on. I've never played with one of them but have seen them in a shop many years ago.
But the wall aiming method works too. The service manual has that information.


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.