I think we are talking apples and banana's here.. Within 29tons comment, he made mention of a "axle" that appeared to be dropped.
I know that the '63-66 C-10,20 Had the independent coil spring front suspension, however I don't know if the '63 C30 had coil springs like the '64 and later.
I have used the later model disk brake front suspension under '64, 66 C-10,20 trucks with no issues, a direct swap, 16 bolts, two of which have to be elongated.
Not only do you get disk brakes, you also get power steering with a factory type application. Wm.
