Wheel/Tire help for 68 notchback barracuda

S/S springs will definitely raise the back of the car, but they can also raise it a bit too high and make the car look like a door wedge. I had to put a couple of metal blocks under my S/S springs to bring the *** down a bit. S.M.G if you go with a BF Goodrich P245 60 R15 on the rear, you should'nt require a spacer or any kind of modication, that tire will mount on 15X8" no problem (all depends on the look you desire), if you start going wider with the tire (255,265,275) it will blung out from the rim and then tire rub becomes more of a risk. Proper backspacing will allow for clearance from the leaf springs and also have the tire sit just in from the wheel opening lip, so if you have people in the back seat the car will not be sitting on top of the tires. Need to be careful with the width of the front rims, so the tires do not catch on the corner of the fender when you have the steering wheel fully cranked.