The wall alignment works pretty well if you have the distance and a flat space.
The white garage doors at work may or may not have some marks at strategic positions.
I also found a Hoppy headlight aiming kit on E-bay about 2 years ago. With shipping they ranged from $75 -$150.
Great kit and fun to play with.
Thx++ 4 mentioning the Hoppy kit. Will investigate. This thread so inspired me that I went out this morning and carefully removed the harness from the wrecked '66. Amazingly enough, all 4 headlights came out intact, though the 2 on the impact side had their tabs bent. All the ceramic sockets are good too. So, after installing the relays and harness on our 68, I'll again have the joy of flooding the streets with the lovely reddish white light wisely approved by the DOT back when that good Feddy Bureau had some teeth.
The nice thing about fat conductors is that with low voltage, one needs extra ampacity far more than at higher potential. I used fine stranded audio grade #10 for this little job, w audio grade 1/4" female terminals in the ceramic sockets. The one addition I'll use this time will be conductive grease on the headlight tabs. Despite the likely viability of the salvaged lamps, I have plenty of them from a SUPER eBay score some years ago, and will use brand new 50-something yr old lamps.
Headlights are the ONLY thing I leave with Old School farmboy lighting, because of that DOT spec enforced then. I don't personally NEED headlights most of the time to SEE, except in truly Stygian gloom. But its usually GOOD to be SEEN by the reckless fools I must share the asphalt with, ergo....