I don't think you have enough area between the bearing retainer on the hub to use a smaller bolt pattern. I did however have the rear axle flanges drilled for 4 3/4 on my 56 to match the front disc conversion. What you might try is the front hubs & drums from a 49-54 car, which are 5 lug. I know they can be used on AD & TF trucks. Not sure about earlier trucks.
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