DDK - Die Deutschen Klassiker

I will be fitting a Retrotrip to my 67 912 over the winter and just wondered if anyone who has fit one to a 912 or early 911 can help me with a couple of questions.
1) Do I need to run it via a voltage conditioner.
2) What form of sensor works best on porsches, speedo wheel or gearbox.

Many thanks

No , I would use a wheel sensor (front - nearest the trip ... ie depending on RH or LHD).
You may have to make up a small bracket to hold the pick up ... and think about hot things when running wire to the pick up !!!