Size does matter

I had that size on my stock 71 Swinger for years. Never rubbed.
The wheel wells will be filled, and you'll have use a smaller tire to fit it the spare tire well.
So if you have sure-grip, a flat on the back will mean changing 2 tires to keep the same circumference and not wreck the clutches.
I love them on my 66 Belvedere and the crazy screech they make hitting second gear. Plus they are so much quieter than most radials.