On my 69 dart I run 15x6.5 rallye wheels on the rear with 245/60x15 tires and 14x7 rallye wheels on the front with 235/60 14 tires. I have the later 74/75A disc swap on my car with an 8 3/4 rearend. I dont notice the track difference and that is mostly due to the smaller rim/tire on front but it still looks good By the way "milehigh" your Dart looks really good with those wheels on it