Here's the thing with putting 275-60-15 tires on 15 x 7 inch rims...

Just because you can , doesn't make it right !!!

I know I will hear it , but that's my firm opinion !!!

Also as a side note , all factory 15 x 7 Cop style wheels ,
with the vent holes in them , are 4.25 backspace.

Also for that car 15 x 7 with a 255-60-15 tire fits best.
Yes one side maybe tighter that the other and you may need
to do some trim work to clearance everything....

Frank