Uhhhh..... Those wheels may not fit. If they are the aluminum wheels, the centering hub is too small to clear both the front disc hub AND the axle centering hub. You cant even reliably hog out the inside to fit without weakening the rim to a dangerous condition. I tried these wheels on a Dart project. They would fit the rear with spacers, but then you have lost the very important feature of hub centering.
The steel wheels might fit. I cant remember if they also used the same hub centering design. The backspacing is very deep and really isnt worth the effort. 15x7 steel wheels are easily found on all the Diplomat/Gran Fury/5th Ave cars in wrecking yards all over the country. They have 3 3/4 backspacing, and they fit Dart/Valiant cars with room to spare.