hmmmm, 87 300D N/A, 87 300TD
...lightly sanding the "prisms" inside the gauge cluster to better diffuse the illumination... brighter dash lights without having to upgrade the bulbs, NO MELTING.
...adjusting bowden cable kept engine on the boil, don't have to mash the pedal anymore
...removing and installing EVAP at home... had one fabricated for cheap
...had an all brass radiator fabricated... kept temps in control! (best mod so far)
...refaced head on the NA 300D after warpage...no leaks whatsoever inside and out.
expensive though
...94-95 headlights and hood for the TD.
...lower body cladding for both 124s
...oiled both panoramic wiper assemblies for super fast wiper action.
... installed a door lock switch for the 300D, don't have to open the door to unlock the other doors, entailed having to remove the wiring for the passenger door trigger
...upgraded the fabric seats of the 300D to the 95 leather, power seats