Front spindles

[vondutch]

I bought a 63 gmc i am in the process of bagging it. The guy who i bought it off of told me that it had a mid 70's van front end. Control arms and brakes. But it has a small gm rotor on it which is 5x4.75 which is a s10 bolt pattern. I put it up to a 76 spindle off of a c10 2wd. They are the same except for the length of the shaft and the diameter.my rotor is to small to fit on that spindle. The casting number off of my spindle is gm 256. Can anybody help me. Thanks