Does anyone know if there is an adjustment to tighten up a headlight assembly when up. My driver side (85S) headlamp unit has a bit of play (mainly front to back) in it and shakes a little when driving with lights on. The passenger side is solid.

 

Yeah, mine did this too. Mine is also an '85, but it's a Euro version and has its original H4s with the funky Euro aiming system to compensate for load in the car. The looseness in mine was caused by the pivots for the lights to accomodate this aiming system. They have these little washer/clip things. One was missing and the other had worked loose. I found a replacement washer/clip and snugged them up and it was fine after that. They do need to be checked periodically.

Bryan