1967 had a 5 on 4-3/4 inch bolt pattern.
The 255P50R-17 tires have a diameter of 27.0", a section width of 10.0",
Your stock tire (E78 bias ply on a 14 inch wheel) had a 26.60 inch height and a cross section of 7.65 width (5.10 inch tread width). The tire and wheel will fit on the back but you have to check for clearance as lowering the car moves the wheel, and tire closer to the fender. Up front I would expect it to rub the frame, but check for actual contact with suspension parts which could cut the tire.