What back space for 15 x 10 cragar S/S wheels on 67 dart

72bluNblu said
Assuming you've got an A-body 8 3/4, you'd have to shorten the rear axle to use that backspace. Probably by a good 7" or so to even be in the ballpark.
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It is an 8 3/4. I will have to shorten it somewhere between 7" to 8" as you mentioned. Trying to figure out a tire size.