I have made several successful conversions using kits obtained from ABS in Orange, CA. www.abspowerbrake.com / 714-771-7329

For the 6 lug conversion, an upgrade to the wheel bearings is recommended.

Their kits include every part and they fit.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine