Right. Sorted.
There are a few things you need to consider.
Firstly, those big flares look silly with standard (even 265s) rubber and tyres. You'll need to go bigger tyres and change wheel offsets to fill them. See kwyjibo's:
Unless you're talented/skilled with plastic or fibreglass work then I wouldn't even try to modify the flares to fit inside the scrub bars. Apart from looks you'll have to make the modifications big enough to allow for the fact that the flares are attached to the body while the bars are attached to the chassis. That means that they'll move relative to each other and so any changes to the flares would need to be big enough to allow for this without contact.
I'd say it would be a much easier proposition to get the scrub bars modified so that they run clear of the new flares.