255-60's will fit on 15x7's on a 70 Swinger

I bought some, tried them on both sides and they do fit with no trimming or spring offset. Really close on the drivers side but many here have mentioned the production tolerances (side to side) on these cars. I drive the car pretty easy. I like the look of big rears but I like the clean look of the small tires too. This coming weekend I will have the rears on minus the trim rings. That might give a more finished look. Like the larger rears on my 66, it shortens up the look of the car. tmm. 255/60-15's on 15x7 Wheel Vintiques Rallys with a 4.25" backspace. The fronts are 205/70-14's on 14x6 Vintiques Rallys with 4" backspace.

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@Chub380 here's a thread with the information you asked me about.