I did a front disk brake conversion on my '50 3600 using a kit I bought on E-Bay that retained the 8 lug hubs. I'm happy with the performance of the parts but the documentation was a bit sketchy regarding which calipers were used as I wanted to document what I had for future service parts needs. It was listed for a 1955-59 Chevy trucks (
https://www.ebay.com/itm/350973126802) but I did need to modify my steering arms if I recall correctly.