I'm gonna say no, they wont fit. My rims have 6.25" (or 6.5" cant recall off the top of my head) BackSpace and they are pretty tight to the frame (8.5" rim) with a 255 tire at full turn. I know that adding 2" of rim outward would never work on my car, be bangin the fender hard!.
That 275 might look a little "stretched" on a 10.5" rim too, but that's personal preference
Bill Reilly has a 285 on a 18x9 with 6.27" of BS mocked up on his Dart, notched his frame a little. His car is a little higher than mine tho, and a Dart fender may allow a little more room :dontknow: maybe
