Dennis,
Contact ABS in Orange, CA. 714-771-6549, www.abspowerbrake.com.
The kit was not in their catalogue, they made it up for us. They use a one piece rotor/hub which is 6 lug. No grinding, cutting or spacers, and allows for stock 15" wheels. The price was about the same as the other suppliers kits. However, the other suppliers could not provide this particular configuration.
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