I did have the drums re-drilled. It is also necessary to machine the center of the outer axle flange as the center hole on the 5 lug wheel is smaller. It has been working well for over 10 years.
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