I just did my 68
I got the disc brake kit from Summit....it's a CPP kit but Summit shipped free
I went with 6 lug as well because I have 3 sets of wheels already
I ordered a 9" dual diaphragm booster, MC, and proportioning valve kit off ebay
my rear brake lines were rusted out at the back and the rubber hose had collapsed, I made up new line myself all the way from the front to the rear wheel cylinders, which I replaced as well.
I added a CPP front sway bar kit as well, along with new lower control arm shafts and bushings as the old ones were quite loose...
Also used the 2½" drop spindles with stock springs to bring the steering geometry back to factory specs.
I still need to take it to have the alignment done but overall I'm happy with the conversion so far.
I had to get adapters for the hose ends..that's all the extra parts I needed
