'67 Dart - No stop lights, turn signals on but don't flash

Update:
The new flasher unit has the same 2 spade connections at 90deg to each other, marked 'X' & 'L', in the same orientation as the failed unit removed from the car, but it turns out that the polarity is incorrect; I made a bodge wire so that the flasher unit terminals can be reversed and the turn signals work fine. I will get the correct flasher unit.
My turn signal problem is fixed; thank you for all of the help given here, much appreciated.