Duster Fender mounted turn signal location.

In case of a non-factory equipped car, installing fender turn signals won't disturb the turn signal flasher unit blinking speed?

I think that T/S flasher units are different for 4 or 6 bulbs, no?
Not sure. My 70 did not have them factory installed, BUT did have the pigtails in the fenders. And the flasher speed seems fine.