I bought a front Dana60 awhile back that came out of a '76 F250 CrewCab. Now that I've done a little research, I know why I got it so cheap. Basically, it's a standard rotation piece (no big deal) that comes with Dana44 axles, 27 spline inners with 19 spline outers. Does anyone know if I'd run into any problems converting to 35spline inners and 30 spline outers like the later dana60 design?