Don't put your new axle bearings in without replacing the retainer and hardware. If you do you are just asking for trouble. Danchuk # 19012 will work on any 1957 classic Chevy stock rearend. Sold as a set of 4. 2 Sets needed per car. New bearing retainers are also available, Danchuk # 19011.
Danchuk has the largest selection of quality 55, 56, 57 parts for your classic Chevy project.