69 Dart Wheel offset

You don't mention your wheels bolt pattern..

If it's the original small bolt pattern (4x5 bolt circle),, your choice of wheels will be extemely limited..

You may want to consider changing to the later "big bolt" (4 1/2 x 5) pattern to avail yourself of a better wheel selection..

There are a buncha threads on how to change-over if you do a "search"

Sorry they are 4.5 x 5