4.5 BS wont have an issue with the fender lip unless its a 10" rim but with 4.5bs the frame will give you issues with rub if the tire has buldge over 1/2"
with 275/60 tires / 28x9 slicks
no two cars seem to be the same as far as the axle sitting perfectly centered in the frame or the body , if your axle isnt too far off you should be ok at the lip unless theres a lot of side to side play due to worn bushings
and you will probably need to run a 1/4 or more spacer to avoid frame rub depending on how much your tire buldges from the rim