Cab mount chop and inner fender cut

I have a 2.5 Billy lift and tires and rims coming Monday. 33x12.50x20. I'm going to chop the body mount this weekend. I will trim the plastic inner fender when I mount the new tires. Do I cut the outside of the fender or just the inside of the fender? Wheels back space is 4.5. Also will be smashing the pinch weld. Any other things I have to do to fit this combo?

 

One more thing I'm not wheeling. Just trying to fit 33's and driving all on the street. Just trying not to rub at full lock making a u turn.

 

did u get these to fit and clear fine?...i got some on order i had 33's 10.50s on 20's with tons of room...in theory it looks like it will work for me and wheel

 

Yep got it to work yesterday. Cab mount chop. Very minor like 1/2 back. Minimal fender trimming. No rub.