Greetings Achill, sweet looking 68!
If you dont mind me asking, how did you get the Dart?
I'm no expert or anthing but I dont think that I've ever seen side view mirrors like that on a Dart.
340? 4-speed?
I get it from my friend who hunted for it for one or two years. He bought it and can't start work with it for a long time, than he decided to sell it and I was first in the line :)
I'm not familiar with mopar cars and so on, so can't comment what mirrors should be. It's 3 speed manual as I know :)
Picture of engine bellow
My plan is to rework body totally, new engine, new gear box and so on...