Wheel base difference side to side

On my 70 Dart the passenger side rear tire is closer to the front lip than the driver side. I wanted to eliminate body panel differences so I measured from center of front spindle to center of rear axle. Sure enough there is almost a quarter inch difference. Front end is all new and rear leafs have solid front eye bushings so I cant blame wore out parts. Would there be any harm in spacing the spring hanger back on the one side to make both sides the same distance?

Nope !! These cars weren't built perfect. Do what you need to suit your purpose.