Haven't heard of that one yet. I used to run 275's on my stock wheels, as I'm sure you are aware that size is not a textbook "correct" fit for an 8" rim, if all you're going for is looks then it works fine. Those who know their crap about this would say you sacrifice a little bit of handling ability.... Anyway, although a 275 has a little bit of excess sidewall bulge on that wheel, my best guess is that a 285/40 wouldn't be noticeably more due to having a taller sidewall.
FWIW, my old Bullitt wheels found a home on my '08 Explorer, wrapped in 265/75 Nitto Terra Grapplers. So they have now had at least 2 sets of tires that the guys at Ford didn't envision the wheels to have mounted on them.
2001 ***** Slayer Red GT convertible; all of the usual bolt-ons.
1967 Notch; 200 I-6, C4 auto