will 275/60/15 fit 71 Duster ?

I have a 71 Duster, 15x7 wheels that look evenly spaced......I put 255/70/15 tires on and there are tight, actually rub a tiny bit in the front.........the car sits low, has original leaf springs.

So...I thought of making up some 1/4" spacers to put between the front spring perches and the unibody to move the axle back a hair....it might do it, but still gonna be tight front and back

These 255/70's are so tall (29") it almost looks too much.......

My other options for tires are.......

275-60-15, which are 28" tall x 10.8" wide....1" shorter and 3/4" wider....

235-70-15, which are 28" tall x 9.25" wide.....1" shorter and 3/4" narrower....

255-60-15, which are 27" tall x 10.0 wide......2" shorter and the same width.....as current

255-70-15, which are 29" tall x 10.0 wide......

255-60 might be too short.....275-60 may be too wide......235-70 will fit for sure.....

Any input ?? Thanks