Fender Trimming/Tire Fitting

I am looking into getting new wheels for my truck because the ones on there now are awful looking. I was looking at getting some methods or similar but I am running into an issue. I currently have 265/75/16 Tires with 10 offset (running stock suspension) and they barely fit in there as is. Would I need to trim in order to get wheels with 0 offset and how much should I trim? If they are too snug i'd imagine it would make wheeling near impossible.

 

What I did to fit my 285's was a generous cmc, pinch weld beat down and then I took it to some back roads near town armed with a box cutter and just trimmed as needed. With 265's and 0 offset you shouldn't have to do a cmc, but you'll need to trim those front mudflaps (or remove them) if you haven't already. And possibly some of the plastic fender in and around the cab mount/ front bumper area

 

Thanks! I removed the front mud flaps already and I am hoping I dont have to do the CMC. I think it will probably just be some trial and error until the fitment works out.