What Tire sizes are best for my 1969 Barracuda Fastback?

215/70-14 is the largest size that will fit all around on the 14" rally wheels. The rally wheels are only 5.5" wide, and 225/70 will hit the fender when turning. Barracudas are much tighter in the wheel well than Darts, with more tuck-under in the body side profile.