I would suggest before you get into body work flaring out the fenders, etc. you buy the rims and tires you expect to put on your car and determine the work that will be necessary to suspension/steering to fit them, and then run them on the street. Steering and brake caliper clearances will get your attention and then modifications to the fender flairs will be consequential. That is of coarse if you intend to drive the car on the street, or race it in competition; If it is a show car going and coming on a trailer, that is entirely different.