14" Rallye Wheels on 1965 Barracuda

No clearance issues at all, and if they are original small bolt rallyes, they will be 5.5” wide. The maximum “recommended” tire you should run is a 215mm. I have seen 235 and 245 on 5.5” rims, but the sidewall bulges way out past the rim edge! You could probably do 225, if you can find them.