Just took a set of those off my 73 Barracuda and those are some small wheels! I don't think you can put anything bigger than 225/70 x14's on them. That or 215/70x14's are probably what you'll have to choose between which will look stock if that's your goal. Most everybody is going to 15" rims because 14" tires are getting increasingly harder to find. Even with 15" you don't have a bunch of choices, especially in performance tires. But if dead stock is the look you're going for it, the 14's will do that.
Later, Jim