All thru the 70s and 80s many of us ran N50x15 tires on 15x10 wheels on E bodies. The N 50 is about 28"tall and 12.6" at the sidewall. A 15x10 wheel with 4.5 backspace provided clearance on the inside but air shocks were mandatory to keep the rear up high and not coming down onto the outer tread of the tire. So even an N50 did not fit correctly and it is smaller in diameter than the tire you are inquiring about. 6.5" backspace is a huge no go on the wheels.