Scott Drake Legendary wheels and BF Goodrich tires

brand new set of Scott Drake Legendary wheels and BF Goodrich tires. I made the grave mistake of purchasing these wheels and after mounting them in the new tires realizing that they are 4 lug nut and I need 5 lug nut wheels for my 66 Mustang. Because I mounted them I can no longer return them. Legendary Wheels are 15×7 come with new lug nut set and new spinners. Tires are BF Goodrich Radials fronts 205/60/15 rears 225/60/15.