Brake swap 69 to 01 Silverado question
 

I have a 69 c10 that I'm starting to put some money in. The front brakes and "spindles" are off of a 2001 silverado. I want to lower the truck and do some suspension work. The drop spindles are easily found, but I'm curious what else would have to have been swapped when this change was made.

Anyone know?