Steve,
I have done several 6 lug disc brake conversions using the stock wheels on TF trucks. I believe that the brake components are the same for AD trucks with the exception of the booster/MC configuration. I get my conversions from ABS Power Brake in Orange, CA. 714-771-7329.
I also would recommend using a booster.
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