Just bought a set of goodyear 265 75 16 mtr's for my truck to replace the stock 245's. I got some american racing wheels that are 16x8 with 4.5 inches of backspacing. Will these look and fit okay or should I run the factory aluminum 16x6.5 wheels. I rather keep the factory wheels and 245's for a spare set.

Should be fine.

Check in my garage. I have 285's on the chrome wheels in there. They were fine.