69 Dart 4 door cruiser

your last line hit the nail on the head. it'll still cruise the highway nicely with the 3.21 gear and a fraction of the work. the 999 and 3.21 gets my vote and as snobby as it sound it is a 4 door after all so it'd need some sentimental attachment to be worth going with the o/d trans. jmo.
neil.