Up and down of the headlight housing within the opening is adjusted at each headlight door pivot. With the lights up, you will see the pivot. Loosen the three bolts on each side a little and you will be able to raise the unit. Once you have it where you want it, tighten the bolts.
Cycle the lights by hand to ensure clearance is good all around, up and down. With the headlights closed, the doors should be flush with the hood surround panel.
Left and right adjustment of the housing within the opening is set by the collars (left and right) on the headlight door next to the pivots mentioned above. Loosen the set screws and move the headlight unit to where you want it. Slide the collars to take up the gap, then tighten the set screws.
Again, cylce the lights by hand to ensure you've got the gaps you want, left and right. With the lights closed, gap left and right should be about 1/8th".
Install the headlight bezels and check everything again.