New wheels

I'm looking at getting some new wheels and tires for my 74 Dart Sport for Christmas. I found some 17" 04 Mustang Bullitt wheels locally with almost new tires. They are asking $375. My question is will the rims fit on my Dart Sport. I'm specifically worried about the front. The rear is an 8 3/4 from a 69 Belvedere. These rims should be 17" x 8" with 5.72" backspacing I believe. I know there is already a thread on this but after reading through it I am more confused than before.
So, will they fit? And is $375 a good deal?