For future reference.... The easiest way to aim the headlights is BEFORE you change out the bulbs or housings, park your car a set distance from a clean wall (the outside garage door works great). I parked mine 25' away and put a chalk mark on the driveway next to the two front tires. Then put two small pieces of painters tape on the garage door at the stock cutoff line. Then took a picture from behind my steering wheel to eliminate any second guessing. Another way is keeping driving towards your closed garage door till the stock cutoff line is level with one of the garage door panel lines. Then stop the truck and mark the driveway so you know where to put your tires when it's time to aim the new ones. Just make sure whatever wall you use is a uniform surface. Don't use stone walls or the back of a garage with shelves and crap piled up.
The next day i installed my new housings and waited till dark. Parked the truck at the line and then using a screwdriver (that's what Alpharex uses) and aimed each headlight till the cutoff line was level with the factory cutoff line. I now had a baseline to know where i wouldn't be blinding anyone. Takes all the guesswork out of it.
