I'm running wheel spacers 15mm up front and 20mm out back, I'm not sure if you would have a problem running those tires without the spacers. I have no rubbing what so ever and it looks like a 265 would be fine, only 10mm more then the 255's I'm running out front.
The stock rims are just about 1/2 too narrow according to most tire manufacturers width recommendations, but like I said, I'm having no problems. I do plan on upgrading to a slightly wider rim in the future though.

Hey I just saw pics of your tires and they look great!
I was wondering if I could run 265/305's with the stock rims, suspension.
Would I be rubbing against the fenders at all?
Would I be stretching the tires at all?

-Crown