1966 Dodge Dart GT Factory Ride height?

I just measured from the wheel opening to the ground and then double checked from the control arm down. As long as you get the look you want and the suspension is somewhere in the middle of it's travel you should be good. Lower height will of course be closer to the snubber so watch that gap. If you can bounce the front end and hit the snubbers you will need to give it more adjustment. You might need a shorter tire to get the look you want.