My plan for new wheels, what do you think?

15 x 6 on the front and 15 x 7 on the back.
245 or 255 - 60 - 15 on the rear and a slightly shorter
tire on the front ...225 - 60 -15.
Never put a 275 -60-15 on a 7 inch rim.

Just because you can , don't make it right. Just a thought !!!

Frank