tire size

My plan was to purchase a CJ7 with the 6 cylinder engine, and put a 4 inch lift and 33 inch tires on it. But when a great deal appeared on a very clean 1981 CJ7 with a 4 Cylinder engine, I couldn't pass it up. With the 4 banger should I be reconsidering my choice of 4 inch lift and 33s? I'd...

So I am looking at getting some new tires and have found a good deal but not sure if they will be to big. Current tires are 235/65r17 and the ones im looking at are 255/70r17. Wondering if they will rub on the wheel wells, etc. My jeep is not lifted. Also the tires i found are cooper...