King pin dana 60's are NOT all the same 78-79 ford D60's had the differential housing further away from the driver side steering knuckle. The D60's 1980 and after king pin and ball joint take the same shafts, due to change in body styles and more specifically frame widths, take notice in how little axle tube is between the casting of the pig and knuckle in the picture, barely room for that sway bar mount let alone any other sort of brackets for a custom build. this is why 78-79 D60's are considered the holy grail of "junk yard" axles, lots of room for brackets, plenty of room to narrow them up, 35 splines and king pins.
i'm always looking for D60's tho, preferably not dually but they can be switched over. I'll give ya 300 for it.