Friend runs Swifts on his MR with a set 18x9.5 works. I think the offset he said was like +20. With a V12 265/35. He tracked on that set up and said he rolled his fenders in the back.
Realize that your tire choice will make a difference, as not all 265's are 265mm. Does sound like your set up will be fine though, I know I plan on running the same setup next year.