Using LX (New Charger/Magnum/300) Wheels on a 74 Dart

FOUND SOME!
Going to pick em up tomorrow.

This leads me to my next question:
They've got 235/40/18 tires on them.
Anyone know if these will work correctly?
I know I've heard of people using larger OEM LX tires on A-Bodies, so I'm assuming yes, but I also don't want them to look too ridiculously small.