You ever dig into it. I have measured a few times and man it would be awfully close. At this point Im going to have to find a used 275/60-15 just to test fit it.I also may just pop for 275/60-15 nittos. I believe they run smaller at 27-3/4".
I havent picked up a set of tires yet, but like you stated it is awfully close to the rocker in front of the rear wheel. I spent some time measuring and after all of that, I think Im going to go with the offset spring hangers to get a little wider tire and probably go with that size and brand that you mentioned. If you get a used tire before I do and get a chance to test fit it post here and let me know. Im hoping to find something real soon!