Hi Mikael,
I didn't have any problem getting my '74 approved at the FDM syn with only white front blinkers/position lights (i.e. no yellow lens or bulb), and with the original US all red tail lights (no orange blinker lens). I said that it was originally for the US market and that was the way it was sold. Unless they have recently changed the rules I think you should try it as is and see if they complain at the inspection.
Cheers, Tim.
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