Size does matter

Whats the tallest bias ply tire someone has put on a stock 69 Dart and still be drive able without rubbing or looking like a 4x4. The 69 lists the factory tire either as a D70-14 or E70-14. Someone has offered me a great deal on some G70-14 Firestone Redlines (Coker bias ply) Has anyone ever tried a tire this size?