315 or 325 tires on early a?

you will have to move the springs an mini tub it before you can fit anything bigger than a 255 under it,

jayson, how wide is your rear end? im running a 275 60 15 with a 15x10 wheel with 5in back spacing, it doesnt rub but its close. i moved my wheel tubs flush with the frame and my springs centered in the fram rail, how wide of a tire will it fit without rubbing (car will not be street drivin

I can't remember the width of my rear it was done 9 years ago. My rear end was cut to fit the wheel and tire combo I had at the time. I just centered the wheels with tires in the tubbs and tape measured between them. I currently have 295/55 tires and have plenty of room. Jayson