You better check & see if mixing sizes with more than 1/2" even of variance will have your ABS throw codes & revert to being NOT ABS.
I am not a fan of white letter tires on anything but true muscle cars & on trucks. I had 255/60/15's on a boxy Delta 88 w/white letters inboard, & the car handled fabulous. We also ran them on some boxy wagons, all w/7" wide wheels. FWIW, I thought the BFG Radial TA's I had first were not nearly as good as the Uniroyal Tiger Paw GTS's.