this is a 67-72 A-body spindle. The spindles are the same . The hubs are different from early to late
Actually it's a 65-72 A body disc brake spindle.
65-66 A body cars got disc brakes, too.
What do you mean the HUBS are different from early to late?
All disc brake hubs are the same from 65-72.
There's no difference in any of them, in all the years.