disks
I don't know if anyone cares, but it might be helpful. Heres how I did disks on my 62. I used the stock drum spindle and drum hub. For a rotor I used front rotors for a 90's S-10 4X4. The 4X4s rotors are hat style that slide over the hub and wheel studs, the cool thing about the s-10 rotors is that other than the fact they are the hat style, they have the same dimensions as a mid 80s monte carlo, cutlass or regal rotors, same diameter and off set. The only modification I had to make for these rotors to fit was to turn the outside diameter of the drum hub down just a few thousands for the hat rotor to fit over. It wasn't much, It could probably be done with a grinder, I used the brake lath at work. The other thing was I had to get longer wheel studs for the thickness of the rotor. This wasn't hard, I just took a stock stud to the parts store for comarison and found some that were longer. For calipers I used the mid 80s GM car's (monte, cutlass, bla bla bla). I also used the 80's GM brake hoses, the funny thing was they fit into the little brackets on the frame like they were made for it! The toughest part was that I made my own caliper brackets out of 1/4 in plate. I bolted the top to the original hole on the spindle intended for the old shoe piviot stud. I bolted the lower part to one of the bolts used to hold the steering arm on the spindle. I got all of my parts at the local parts house and it wasn't that expensive.
on another note, you might want to look at those 69 and 70 impala spindles again. Full size chevys from 58-64 had the lower ball joint pointing down towards the ground. Everything I have seen from 65 up has the lower ball joint pointing upward, except for the corvettes.
