I need an inner race for my 41'. Can/should you buy just the race, or replace as a bearing race set?
You don't necessarily have to replace both sets in a hub (inboard and outboard), but it's best to replace the entire bearing assembly/set (inner race, bearing retainer with rolling elements, and outer race) when one component shows obvious signs of distress (flaking, pitting, brinnelling). When one component of a given set is failed or failing, the mating components see higher stresses and experience more "accumulated damage", even if unseen.
I just replaced the rear wheel bearing and axle half shaft in my '47 after I discovered spalling on the axle shaft. It increases the size of the job, but it's nice to know it's done right.
Have fun,
Bill
