Heres a posting from Ken on this subject, hope it helps
--------------------------------------------------------------------------------
FE sedans were fitted with Lucas headlamps, wagons, vans & utes were fitted with Bosch.
Except for the first 200 utes built in Vic and the first 96 utes built in WA which had Lucas lights.
FC's were fitted indiscriminately with Lucas & Bosch headlights as supplies were ordered and delivered.
There are no markings or identification to indicate what car had what equipment. It simply was a matter of fitting what was there to be fitted. GMH had 2 suppliers of most parts and if you look hard enough at various pieces you will see differences.
Did you know that Bosch headlight rims are different to Lucas headlight rims?
FE up to eng # L 386732 were fitted with Lucas regulators - from then on all FE and FC were fitted with Bosch regulators.