need to know what i need for width and backspaceing on 17s for my 70 dart swinger

[swinger400hp]

does any body know what size and backspacing i need to fit 17,s on my 70 dart swinger with a 8 3/4 rear and drum brakes all around also small bolt pattern somebody must have done it or know the tire and wheel size i can just bolt on with no altering

 

[AndyF]

Just use 17 inch rims that have the same width and backspacing as your current rims. Use tires with the same width and diameter as your current tires. Then the new tires will bolt on and fit exactly the same as your existing tires.