Since the car is already street legal in France I would think a change of ownership and getting French plates again should not be a problem?
Good luck with the car - to me the specs seem very good for a GTD !
As far as fuel pumps for carbs go any race parts store should be able to help you (I usually turn to Jansen Competition in Austria or Raceparts, Merlin in the UK). For fuel injection I recommend Kinsler in the US.
