I think the general consensus has been to shift over the 65 front end. Not as simple as that since you need steering box all the way out. But in the long run, with cost of parts and future availability of parts, it's the way to go. But, if you can get the parts for the 63, and the steering box is good (them can be pricy to replace unless you can find a good used one), you my find the cost a wash when you include that.