8 inch wheels with 4 1/4 back space. you will get the widest tire on the car. I tried a 7 inch with a 3 /12 back space and 4 inch, the tire bulge would make them worse. Black 70 dart has 8 inch red 70 dart has 7 inch. 69 had 8's , check out the date on the 69 picture
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